Add notes around Docker networking

FAQ.md

@@ -11,10 +11,10 @@ Alternatively, head on over to the `#General` channel on the Ombi Discord and su
  [Link Ombi to Plex Cloud](https://github.com/tidusjar/Ombi/wiki/FAQ#how-to-configure-ombi-to-talk-to-plex-cloud)
 * [Request notifications not being received](https://github.com/tidusjar/Ombi/wiki/FAQ#notifications-for-requests-not-being-received)
 * [Language is not defaulting properly in Chrome](https://github.com/tidusjar/Ombi/wiki/FAQ#ombi-does-not-default-to-english-or-my-preferred-language)
+* [Ombi and Docker Services ](https://github.com/tidusjar/Ombi/wiki/FAQ#docker-issues)
 * [Ombi Databases](https://github.com/tidusjar/Ombi/wiki/FAQ#what-are-the-dbs-for)
 * [Adding Ombi to Logarr](https://github.com/tidusjar/Ombi/wiki/FAQ#how-can-i-include-ombi-logs-in-logarr)
 * [Set all requests to 'unapproved'](https://github.com/tidusjar/Ombi/wiki/FAQ#can-i-force-requests-to-re-add-to-client-systems)
-* [Ombi and Sonarr containers aren't talking to each other](https://github.com/tidusjar/Ombi/wiki/FAQ#docker-issues)
 ***
 ### When searching for a TV Show, it appears and then disappears straight away! Or doesn't appear at all!
 
@@ -74,8 +74,12 @@ To get Ombi to display the language you want, make that language appear as the f
 You can do this by going to the language settings in Chrome `(chrome://settings/languages)` > click the down arrow next to Language > click the 3 ellipsis by the language you want to set as default > click move to the top. Please set Chrome to use this as display language as well. 
 
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-### Docker Considerations
-
+### Docker Issues
+If you're running all your services in containers, be mindful that sometimes NAT is a fickle mistress for those who fiddle.<br>
+If you have services behind a reverse proxy, use the full external address for the service. <br>
+If you have them behind Organizr as well, then use the Docker IP and port of each container instead - to avoid any routing or authentication issues that this can cause.<br>
+If you use the host IP instead of the container IP, be sure to use the local port you mapped to the container, rather than simply the container port (these are not always the same).<br>
+For a breakdown of docker networking (and some reasoning), see [Docker Networking](https://github.com/tidusjar/Ombi/wiki/Docker-Containers).
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 ### What are the DB's for?
 There are 3 databases that Ombi uses.