switch to using public dev container

.devcontainer/docker-compose.yml

@@ -1,15 +1,10 @@
 version: '3'
 services:
   tedge:
-    build:
-      context: .
-      dockerfile: Dockerfile
-      args: 
-        VARIANT: bookworm
+    image: ${DEVCONTAINER_IMAGE:-ghcr.io/thin-edge/devcontainer:latest-bookworm}
     environment:
       - DOCKER_HOST=unix:///opt/run/docker.sock
 
-    # Option 1: Use privileged container (for dev purposes only!)
     volumes:
       # Mount docker socket to something other than /var/run as a
       # a privileged container or with CAP_SYS_ADMIN overwrites this
@@ -21,18 +16,6 @@ services:
       - ..:/workspace:cached
     privileged: true
 
-    # Option 2: Only mount cgroup as readonly (but requires it to already exist)
-    # privileged: true
-    # volumes:
-    #   # Mount docker socker to something other that /var/run as a
-    #   # a privileged container or with CAP_SYS_ADMIN overwrites this
-    #   - /var/run/docker.sock:/opt/run/docker.sock
-    #   - tedge-bashhistory:/commandhistory
-    #   - device-certs:/etc/tedge/device-certs
-    #   - /sys/fs/cgroup:/sys/fs/cgroup:ro
-    # cap_add:
-    #   - CAP_SYS_ADMIN
-
 volumes:
   tedge-bashhistory:
   device-certs: