ci: add staging images

.woodpecker/build-and-publish.yml

@@ -23,3 +23,17 @@ steps:
     when:
     - branch: main
       event: push
+
+  - name: container-build-and-publish (staging)
+    image: docker
+    commands:
+      - docker login --username radical --password $PASSWORD git.gorb.app
+      - docker buildx build --platform linux/amd64,linux/arm64 --rm --push -t git.gorb.app/gorb/frontend:staging .
+    environment:
+      PASSWORD:
+        from_secret: docker_password
+    volumes:
+      - /var/run/podman/podman.sock:/var/run/docker.sock
+    when:
+    - branch: staging
+      event: push