I'm connecting to my VM (Ubuntu server) with Bastion, and I can see and use the terminal through the web browser (Chrome). This is working fine.
However, I would like to connect a display.
$ gvim &  2325 $ E233: cannot open display
Usually when setting a display I need to export the
DISPLAY env variable and set it to the X11 server. But how can I configure that for Bastion? I know this can be done because I've seen screenshots of GUI on Bastion, I'm probably missing some configuration on my VM.