Socket vs IP connection on Linux

[DawidJanczak]

Just posting it here in case it helps someone and perhaps we can amend the README if this makes sense. On Linux (Arch) I am not able to open the connection using instructions provided. That's the bad news, the good news however is that it ends up being a bit easier. Because we're providing the docker image with the X11 socket we don't really need to whitelist the IP, we can instead whitelist local connections. So to summarise what worked for me was:

• In docker container set DISPLAY to :0 - this will use the local socket
• On host set xhost +local: - this allows local connections to X server