Update CI files.

.woodpecker/.build-and-push-to-registry.yml

@@ -1,19 +1,18 @@
-kind: pipeline
-name: build-and-push-to-registry
-
-steps:  
-  build-and-push-to-registry:
-    image: woodpeckerci/plugin-docker-buildx:5.1
-    settings:
-      username:
-        from_secret: REGISTRY_USERNAME
-      password: 
-        from_secret: REGISTRY_PASSWORD
-      registry: registry.binderlab.io
-      repo: registry.binderlab.io/harbormaster-client
-      tags: latest
-      dockerfile: docker/Dockerfile
-      context: .
-      push: true
-    when:
-      event: manual
+workflow:
+  name: build-and-push-to-registry
+  steps:  
+    build-and-push-to-registry:
+      image: woodpeckerci/plugin-docker-buildx:5.1
+      settings:
+        username:
+          from_secret: REGISTRY_USERNAME
+        password: 
+          from_secret: REGISTRY_PASSWORD
+        registry: registry.binderlab.io
+        repo: registry.binderlab.io/harbormaster-client
+        tags: latest
+        dockerfile: docker/Dockerfile
+        context: .
+        push: true
+      when:
+        event: manual