[Docker] Listening for IPv6 connections (#5180)

* Listen for IPv6 connections

* Added information about LISTEN6 variable

* Make LISTEN variable a comma-separated list of values

* Removed debug commands

* Revert changes

---------

Co-authored-by: Rufubi <>

Docker/FreshRSS.Apache.conf

@@ -1,5 +1,5 @@
 ServerName freshrss.localhost
-Listen 0.0.0.0:80
+Listen 80
 DocumentRoot /var/www/FreshRSS/p/
 RemoteIPHeader X-Forwarded-For
 RemoteIPTrustedProxy 10.0.0.1/8 172.16.0.1/12 192.168.0.1/16

Docker/README.md

@@ -86,7 +86,7 @@ and with newer packages in general (Apache, PHP).
 * `FRESHRSS_ENV`: (default is `production`) Enables additional development information if set to `development` (increases the level of logging and ensures that errors are displayed) (see below for more development options)
 * `COPY_LOG_TO_SYSLOG`: (default is `On`) Copy all the logs to syslog
 * `COPY_SYSLOG_TO_STDERR`: (default is `On`) Copy syslog to Standard Error so that it is visible in docker logs
-* `LISTEN`: (default is `0.0.0.0:80`) Modifies the internal Apache listening port, e.g. `0.0.0.0:8080` (for advanced users; useful for [Docker host networking](https://docs.docker.com/network/host/))
+* `LISTEN`: (default is `80`) Modifies the internal Apache listening address and port, e.g. `0.0.0.0:8080` (for advanced users; useful for [Docker host networking](https://docs.docker.com/network/host/))
 * `FRESHRSS_INSTALL`: automatically pass arguments to command line `cli/do-install.php` (for advanced users; see example in Docker Compose section). Only executed at the very first run (so far), so if you make any change, you need to delete your `freshrss` service, `freshrss_data` volume, before running again.
 * `FRESHRSS_USER`: automatically pass arguments to command line `cli/create-user.php` (for advanced users; see example in Docker Compose section). Only executed at the very first run (so far), so if you make any change, you need to delete your `freshrss` service, `freshrss_data` volume, before running again.