Documentation update + remove docker build:

* Update documentation and removed deprecated parts
* removed Docker image build files, as it is no more needed

server/lib/settings.ts

@@ -243,7 +243,8 @@ You can close this port on your firewall, it will not be accessed from the outer
     descriptionHTML:
 `Please let this settings empty if you don't know what you are doing.<br>
 In some rare case, Prosody can't call Peertube's API from its public URI.
-You can use this field to customise Peertube's URI for Prosody modules (for example with «http://localhost:9000»).`
+You can use this field to customise Peertube's URI for Prosody modules
+(for example with «http://localhost:9000» or «http://127.0.0.1:9000»).`
   })
 
   registerSetting({