Update config.md

Added note to add ", chain=DOCKER-USER" to the fail2ban jail action if using docker networks By default, the jail action chain is "INPUT", but "FORWARD" is used when using docker networks. "DOCKER-USER", available when using docker, is part of the "FORWARD" chain. Hence the note to use "DOCKER-USER".
binwiederhier · Aug 31, 2024 · 5b10cd6 · 5b10cd6
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diff --git a/docs/config.md b/docs/config.md
@@ -1242,6 +1242,8 @@ and [here](https://easyengine.io/tutorials/nginx/block-wp-login-php-bruteforce-a
     maxretry = 10
     ```
 
+!!! info If you run nginx in a container, append `, chain=DOCKER-USER` to the jail.local action.
+
 ## Health checks
 A preliminary health check API endpoint is exposed at `/v1/health`. The endpoint returns a `json` response in the format shown below.
 If a non-200 HTTP status code is returned or if the returned `healthy` field is `false` the ntfy service should be considered as unhealthy.