fix(docker): make Portainer repository deploy buildable

docker-compose.yml

@@ -7,12 +7,14 @@ version: "3.9"
 services:
   gashboard:
     # Portainer "Stacks → Repository" will build this from the gashboard git repo.
-    # If you want to pull a pre-built image instead, comment out `build:` and
-    # set `image:` to your registry tag.
+    # Do not set `image: gashboard:...` here: Portainer will try to pull that
+    # local-only name from Docker Hub before building and deployment will fail.
+    # If you want to pull a pre-built image instead, replace `build:` with an
+    # `image:` value that includes your registry, for example:
+    # image: ghcr.io/your-user/gashboard:0.1.0
     build:
       context: .
       dockerfile: Dockerfile
-    image: gashboard:0.1.0
     container_name: gashboard
     restart: unless-stopped
     environment: