Merge pull request #1745 from DarthGandalf/znc

Try to make this less confusing

znc/content.md

@@ -17,10 +17,10 @@ $ docker run -it -v znc-cfg:/znc-data %%IMAGE%% --makeconf
 To run ZNC:
 
 ```console
-$ docker run -p 6697:6697 -v znc-cfg:/znc-data %%IMAGE%%
+$ docker run -p 12345:12345 -v znc-cfg:/znc-data %%IMAGE%%
 ```
 
-The port should match the port you used during `--makeconf`. Note that 6667 is often blocked by web browsers, and therefore is not recommended.
+The port (12345 in the example above) should match the port you used during `--makeconf`. Note that 6667 and 6697 are often blocked by web browsers, and therefore are not recommended for ZNC.
 
 If you use any external module, put the .cpp, .py or .pm file to `/znc-data/modules` (you may need to create that directory).