Improve error messages, esp. when the server is running

* Add file context to minifier errors when publishing
* Misc fixes (see issues)
* Allow custom server error template in layouts/server/error.html

To get to this, this commit also cleans up and simplifies the code surrounding errors and files. This also removes the usage of `github.com/pkg/errors`, mostly because of https://github.com/pkg/errors/issues/223 -- but also because most of this is now built-in to Go.

Fixes #9852
Fixes #9857
Fixes #9863

1 files changed, 3 insertions, 2 deletions

diff --git a/releaser/releaser.go b/releaser/releaser.go
index cdfba3c7a..6bcfe3c80 100644
--- a/releaser/releaser.go
+++ b/releaser/releaser.go
@@ -26,8 +26,9 @@ import (
 
 	"github.com/gohugoio/hugo/common/hexec"
 
+	"errors"
+
 	"github.com/gohugoio/hugo/common/hugo"
-	"github.com/pkg/errors"
 )
 
 const commitPrefix = "releaser:"
@@ -217,7 +218,7 @@ func (r *ReleaseHandler) release(releaseNotesFile string) error {
 	cmd.Stderr = os.Stderr
 	err := cmd.Run()
 	if err != nil {
-		return errors.Wrap(err, "goreleaser failed")
+		return fmt.Errorf("goreleaser failed: %w", err)
 	}
 	return nil
 }