Additional documentation for etc/hosts configuration issue (#2273)

Adding additional documentation to make troubleshooting for this error clearer

Author: KesterTan

docs/installation/docker-compose.md

@@ -308,3 +308,5 @@ You can resolve this by changing the owner of the files to be your current user,
 This happens when you are accessing Autolab via localhost, as Tango will attempt to send the autograder logs to its own localhost instead.
 
 To remedy this, add `127.0.0.1 autolab` to `/etc/hosts` and access Autolab via `http://autolab` instead of `http://localhost`.
+
+If you are accessing Autolab on a different host, add `<your public_ip> <your fqdn> autolab` to your `/etc/hosts` file and access Autolab via `http://autolab`.    

docs/installation/tango-troubleshoot.md

@@ -10,4 +10,11 @@ $ redis-cli
 127.0.0.1:6379> FLUSHALL
 OK
 127.0.0.1:6379> 
-```
+```
+
+## Tango jobs completed but scores are not updated
+If you are accessing Autolab on localhost, Tango will attempt to send the autograder logs to its own localhost instead. 
+
+To fix this, add `127.0.0.1 autolab` to your `/etc/hosts` file and access Autolab via `http://autolab` instead of `http://localhost`.
+
+If you are accessing Autolab on a different host, add `<your public_ip> <your fqdn> autolab` to your `/etc/hosts` file and access Autolab via `http://autolab`.