separate build and push

.drone.yml

@@ -34,13 +34,26 @@ steps:
         path: /var/run
     environment:
       REGISTRY: git.half-9.net
-      USER: n0vember
       OWNER: containers
       IMAGE: pihole-exporter
       TAG: latest
+    commands:
+      - docker build -t $REGISTRY/$OWNER/$IMAGE:$TAG .
+
+  - name: container publish
+    image: registry.gitlab.com/role_unit/role_unit_containers:build
+    privileged: true
+    volumes:
+      - name: dockersock
+        path: /var/run
+    environment:
+      REGISTRY: git.half-9.net
+      OWNER: containers
+      IMAGE: pihole-exporter
+      TAG: latest
+      USER: n0vember
       TOKEN:
         from_secret: registry_token
     commands:
       - docker login --username="$USER" --password="$TOKEN" $REGISTRY
-      - docker build -t $REGISTRY/$OWNER/$IMAGE:$TAG .
       - docker push $REGISTRY/$OWNER/$IMAGE:$TAG