Ubuntu 16.04 config, if someone might come up with that problem

<VirtualHost *:80>
ServerName forum.mysite.com
<Location />
ProxyPass http://127.0.0.1:4567/
ProxyPassReverse http://1277.0.0.1:4567/
</Location>
<Location /assets>
ProxyPass http://127.0.0.1:4567/assets/
ProxyPassReverse http://1277.0.0.1:4567/assets/
</Location>
<Location /socket.io>
ProxyPass http://127.0.0.1:4567/socket.io/
ProxyPassReverse http://1277.0.0.1:4567/socket.io/
</Location>
</VirtualHost>