Add dockerhub push CI

.drone.yml

@@ -11,19 +11,7 @@ steps:
         path: /var/run/docker.sock
     commands:
       - docker-compose build frontend
-
-volumes:
-  - name: dockersock
-    host:
-      path: /var/run/docker.sock
-
----
-kind: pipeline
-type: docker
-name: docker
-
-steps:
-  - name: docker
+  - name: publish
     image: plugins/docker
     settings:
       username:
@@ -32,13 +20,14 @@ steps:
         from_secret: docker_password
       repo: grimmigerfuchs/schwarzesbrett
       tags: latest
-      context: ./docker/schwarzesbrett
-
-depends_on:
-  - frontend
-
-trigger:
+    volumes:
+      - name: dockersock
+        path: /var/run/docker.sock
+    when:
       branch:
         - main
-  event:
-    - push
+
+volumes:
+  - name: dockersock
+    host:
+      path: /var/run/docker.sock