Merge branch 'fix/puma_background' into 'master'

Use the shells background feature to put it into background.

See merge request gitlab-org/gitlab!52404

bin/web_puma

@@ -25,7 +25,7 @@ get_puma_pid()
 
 start()
 {
-  spawn_puma -d
+  spawn_puma &
 }
 
 start_foreground()