ci: Add demo app instance (#613) #1799

Job	Run time
Check for GitLeaks	5s
Build the frontend	38s
Test and lint the backend	30s
Test and lint the frontend	36s
Build the docker image	2m 39s
Build the app (linux, amd64)	43s
Build the app (linux, arm64)	41s
Build the app (darwin, amd64)	33s
Build the app (darwin, arm64)	45s
Build the app (windows, amd64)	35s
Build the app (windows, arm64)	1m 1s
Build the Debian package (amd64)	9s
End-to-end tests (memory, memory)	31s
Build the Debian package (arm64)	8s
End-to-end tests (memory, redis)	32s
End-to-end tests (redis, memory)	1m 3s
End-to-end tests (redis, redis)	49s
End-to-end tests (fs, memory)	37s
End-to-end tests (fs, redis)	35s
	13m 10s

Provide feedback