Improve the devcontainer experience (#3492)

* Make it easier to run the devcontainer

* Some more improvements

* Tidy up few other things

* Better name stages

* Fix CI

* Setup everything with one click

* Allow to set IMAGE_OWNER

* Change IMAGE_OWNER to IMAGE_REPO

* Fix CI with IMAGE_REPO

* Fix nodejs installation

* Test devcontainer build as part of CI

* Build devcontainer in its own job

* Fix devcontainer cli installation

* Fix devcontainer build

* Fix devcontainer build in CI again

* Enable buildkit only

* Increase coverage of devcontainer test

* Fix devcontainer start in CI

* Ensure latest version of docker compose is used

* Fix install compose action

* Disable CI stuff which does not work until we fix them

config/config.yml.example

@@ -0,0 +1,16 @@
+mqtt:
+  host: mqtt
+
+cameras:
+  test:
+    ffmpeg:
+      inputs:
+        - path: /media/frigate/car-stopping.mp4
+          input_args: -re -stream_loop -1 -fflags +genpts
+          roles:
+            - detect
+            - rtmp
+    detect:
+      height: 1080
+      width: 1920
+      fps: 5