Electron: Missing X server or $DISPLAY

Question

I've been running an Electron App on a Pi4, Ubuntu 22.04 Server, and Gnome desktop without issue. Since it runs as a kiosk anyway as a single app, I've been attempting to eliminate Gnome and just launching from the CLI (with X installed). However, I'm getting:

ERROR:ozone_platform_x11.cc(247) Missing X server or $DISPLAY
The platform failed to initialize. Exiting.

I've read about setting "DISPLAY=$HOST_IP:10.0", however I'm not clear where that would be set, or if that's applicable to this situation. I'm pretty new to this part, so any help would be appreciated!

Answer 1

At Raspberry PI 4, I did:

$ export DISPLAY=$(cat /etc/resolv.conf | grep nameserver | awk '{print $2; exit;}'):0.0

and it ended up as:

$ echo $DISPLAY
192.168.0.1:0.0

But still same problem - Missing X Server

My final solution:

$ export DISPLAY=:0

Then worked fine!