update documentation, docker and ansible files

1 files changed, 14 insertions, 0 deletions

diff --git a/README.md b/README.md
index 0e8dd601..fa35788d 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,7 @@ Front Page|Post
     + [Requirements](#requirements)
     + [Set up Postgres DB](#set-up-postgres-db)
     + [Running](#running)
+- [Configuration](#configuration)
 - [Documentation](#documentation)
 - [Support](#support)
 - [Translations](#translations)
@@ -222,6 +223,19 @@ cd lemmy
 # cd server && cargo watch -x run
 ```
 
+## Configuration
+
+The configuration is based on the file [defaults.hjson](server/config/defaults.hjson). This file also contains
+documentation for all the available options. To override the defaults, you can copy the options you want to change
+into your local `config.hjson` file. 
+
+Additionally, you can override any config files with environment variables. These have the same name as the config
+options, and are prefixed with `LEMMY_`. For example, you can override the `database.password` with 
+`LEMMY_DATABASE_PASSWORD=my_password`.
+
+An additional option `LEMMY_DATABASE_URL` is available, which can be used with a PostgreSQL connection string like
+`postgres://lemmy:password@lemmy_db:5432/lemmy`, passing all connection details at once.
+
 ## Documentation
 
 - [Websocket API for App developers](docs/api.md)