[Offen] Sets up offen.

system/hosts/mcp/containers.nix

@@ -10,8 +10,9 @@
     ./containers/jobhunt.nix
     ./containers/mariadb.nix
     ./containers/nextcloud.nix
-    ./containers/prometheus.nix
+    ./containers/offen.nix
     ./containers/pocket-id.nix
+    ./containers/prometheus.nix
     ./containers/public-homepage.nix
     ./containers/searxng.nix
     ./containers/shared-postgres.nix