Expose reverse proxy related configuration as environment variables (#1048)18.0.3-fpm-alpine18.0.3-fpm18.0.3-apache18.0.317.0.5-fpm-alpine17.0.5-fpm17.0.5-apache17.0.516.0.9-fpm-alpine16.0.9-fpm16.0.9-apache16.0.9

* Expose reverse proxy related configuration as environment variables

Signed-off-by: András Maróy <andras@maroy.hu>

* Update README.md

Co-Authored-By: J0WI <J0WI@users.noreply.github.com>
Signed-off-by: András Maróy <andras@maroy.hu>

* Update README.md

Co-Authored-By: J0WI <J0WI@users.noreply.github.com>
Signed-off-by: András Maróy <andras@maroy.hu>

* Add default values for reverse proxy config from environment

Signed-off-by: András Maróy <andras@maroy.hu>

* Change reverse proxy default values to null

Signed-off-by: András Maróy <andras@maroy.hu>

* Store environment variables in vars in reverse-proxy config

Signed-off-by: András Maróy <andras@maroy.hu>

* Merge reverse proxy configs

Signed-off-by: András Maróy <andras@maroy.hu>

* Move overwrite parameters to reverse proxy section in the readme

Signed-off-by: András Maróy <andras@maroy.hu>

* Add reverse proxy config to 19.0-beta images

Signed-off-by: András Maróy <andras@maroy.hu>

* Remove default null from reverse proxy config to avoid breaking existing deployments

Signed-off-by: András Maróy <andras@maroy.hu>

Co-authored-by: J0WI <J0WI@users.noreply.github.com>

27 files changed, 338 insertions, 144 deletions

diff --git a/.config/reverse-proxy.config.php b/.config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/.config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/.config/reverse_proxy.config.php b/.config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/.config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/16.0/apache/config/reverse-proxy.config.php b/16.0/apache/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/16.0/apache/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/16.0/apache/config/reverse_proxy.config.php b/16.0/apache/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/16.0/apache/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/16.0/fpm-alpine/config/reverse-proxy.config.php b/16.0/fpm-alpine/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/16.0/fpm-alpine/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/16.0/fpm-alpine/config/reverse_proxy.config.php b/16.0/fpm-alpine/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/16.0/fpm-alpine/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/16.0/fpm/config/reverse-proxy.config.php b/16.0/fpm/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/16.0/fpm/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/16.0/fpm/config/reverse_proxy.config.php b/16.0/fpm/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/16.0/fpm/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/17.0/apache/config/reverse-proxy.config.php b/17.0/apache/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/17.0/apache/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/17.0/apache/config/reverse_proxy.config.php b/17.0/apache/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/17.0/apache/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/17.0/fpm-alpine/config/reverse-proxy.config.php b/17.0/fpm-alpine/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/17.0/fpm-alpine/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/17.0/fpm-alpine/config/reverse_proxy.config.php b/17.0/fpm-alpine/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/17.0/fpm-alpine/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/17.0/fpm/config/reverse-proxy.config.php b/17.0/fpm/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/17.0/fpm/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/17.0/fpm/config/reverse_proxy.config.php b/17.0/fpm/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/17.0/fpm/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/18.0/apache/config/reverse-proxy.config.php b/18.0/apache/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/18.0/apache/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/18.0/apache/config/reverse_proxy.config.php b/18.0/apache/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/18.0/apache/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/18.0/fpm-alpine/config/reverse-proxy.config.php b/18.0/fpm-alpine/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/18.0/fpm-alpine/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/18.0/fpm-alpine/config/reverse_proxy.config.php b/18.0/fpm-alpine/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/18.0/fpm-alpine/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/18.0/fpm/config/reverse-proxy.config.php b/18.0/fpm/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/18.0/fpm/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/18.0/fpm/config/reverse_proxy.config.php b/18.0/fpm/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/18.0/fpm/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/19.0-beta/apache/config/reverse-proxy.config.php b/19.0-beta/apache/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/19.0-beta/apache/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/19.0-beta/apache/config/reverse_proxy.config.php b/19.0-beta/apache/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/19.0-beta/apache/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/19.0-beta/fpm-alpine/config/reverse-proxy.config.php b/19.0-beta/fpm-alpine/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/19.0-beta/fpm-alpine/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/19.0-beta/fpm-alpine/config/reverse_proxy.config.php b/19.0-beta/fpm-alpine/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/19.0-beta/fpm-alpine/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/19.0-beta/fpm/config/reverse-proxy.config.php b/19.0-beta/fpm/config/reverse-proxy.config.php
new file mode 100644
index 00000000..667be312
--- /dev/null
+++ b/19.0-beta/fpm/config/reverse-proxy.config.php
@@ -0,0 +1,25 @@
+<?php
+$overwriteHost = getenv('OVERWRITEHOST');
+if ($overwriteHost) {
+  $CONFIG['overwritehost'] = $overwriteHost;
+}
+
+$overwriteProtocol = getenv('OVERWRITEPROTOCOL');
+if ($overwriteProtocol) {
+  $CONFIG['overwriteprotocol'] = $overwriteProtocol;
+}
+
+$overwriteWebRoot = getenv('OVERWRITEWEBROOT');
+if ($overwriteWebRoot) {
+  $CONFIG['overwritewebroot'] = $overwriteWebRoot;
+}
+
+$overwriteCondAddr = getenv('OVERWRITECONDADDR');
+if ($overwriteCondAddr) {
+  $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
+}
+
+$trustedProxies = getenv('TRUSTED_PROXIES');
+if ($trustedProxies) {
+  $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
+}
diff --git a/19.0-beta/fpm/config/reverse_proxy.config.php b/19.0-beta/fpm/config/reverse_proxy.config.php
deleted file mode 100644
index 26a8bff3..00000000
--- a/19.0-beta/fpm/config/reverse_proxy.config.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-$trustedProxies = getenv('TRUSTED_PROXIES');
-
-if ($trustedProxies) {
-  $trustedProxies = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $trustedProxies = null;
-}
-
-$CONFIG['trusted_proxies'] = $trustedProxies;
\ No newline at end of file
diff --git a/README.md b/README.md
index 4ea87e08..431072aa 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,8 @@ To use an external SMTP server, you have to provide the connection details. To c
 - `MAIL_FROM_ADDRESS` (not set by default): Use this address for the 'from' field in the emails sent by Nextcloud.
 - `MAIL_DOMAIN` (not set by default): Set a different domain for the emails than the domain where Nextcloud is installed.
 
-Check the [Nextcloud documentation](https://docs.nextcloud.com/server/15/admin_manual/configuration_server/email_configuration.html) for other values to configure SMTP.
+Check the [Nextcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/email_configuration.html) for other values to configure SMTP.
+
 
 ## Using the apache image behind a reverse proxy and auto configure server host and protocol
 
@@ -166,6 +167,17 @@ The apache image will replace the remote addr (ip address visible to Nextcloud)
 
 - `TRUSTED_PROXIES` (empty by default): A space-separated list of trusted proxies. CIDR notation is supported for IPv4.
 
+If the `TRUSTED_PROXIES` approach does not work for you, try using fixed values for overwrite parameters.
+
+- `OVERWRITEHOST` (empty by default): Set the hostname of the proxy. Can also specify a port.
+- `OVERWRITEPROTOCOL` (empty by default): Set the protocol of the proxy, http or https.
+- `OVERWRITEWEBROOT` (empty by default): Set the absolute path of the proxy.
+- `OVERWRITECONDADDR` (empty by default): Regex to overwrite the values dependent on the remote address.
+
+Check the [Nexcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/reverse_proxy_configuration.html) for more details.
+
+Keep in mind that once set, removing these environment variables won't remove these values from the configuration file, due to how Nextcloud merges configuration files together.
+
 # Running this image with docker-compose
 The easiest way to get a fully featured and functional setup is using a `docker-compose` file. There are too many different possibilities to setup your system, so here are only some examples of what you have to look for.