Add production deploy workflow

Author: catarak

.github/workflows/deploy-staging.yml

@@ -1,8 +1,11 @@
 name: Deploy to staging
 on:
-  push:
+  workflow_run:
+    workflows: ["Test"]
     branches:
-      - chore/github-actions
+      - develop
+    types:
+      - completed
 env:
   PROJECT_ID: ${{ secrets.GKE_PROJECT }}
   GKE_CLUSTER: p5js-web-editor-cluster

.github/workflows/deploy.yml

@@ -0,0 +1,63 @@
+name: Deploy to production
+on:
+  workflow_run:
+    workflows: ["Test"]
+    branches:
+      - release
+    types:
+      - completed
+env:
+  PROJECT_ID: ${{ secrets.GKE_PROJECT }}
+  GKE_CLUSTER: p5js-web-editor-cluster
+  GKE_ZONE: us-east1-c
+  DEPLOYMENT_NAME: web-editor-node
+  IMAGE: ${{ secrets.DOCKER_USERNAME }}/p5.js-web-editor
+jobs:
+  push_to_registry:
+    environment: production
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Build and push to Docker Hub
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          pull: true
+          push: true
+          tags: |
+            ${{ env.IMAGE }}:${{ github.sha }}
+            ${{ env.IMAGE }}:latest
+          target: production
+      # Setup gcloud CLI
+      - uses: google-github-actions/setup-gcloud@v0.2.0
+        with:
+          service_account_key: ${{ secrets.GKE_SA_KEY }}
+          project_id: ${{ secrets.GKE_PROJECT }}
+ 
+      # Configure docker to use the gcloud command-line tool as a credential helper
+      - run: |-
+          gcloud --quiet auth configure-docker
+        
+      # Get the GKE credentials so we can deploy to the cluster
+      - uses: google-github-actions/get-gke-credentials@v0.2.1
+        with:
+          cluster_name: ${{ env.GKE_CLUSTER }}
+          location: ${{ env.GKE_ZONE }}
+          credentials: ${{ secrets.GKE_SA_KEY }}
+
+      # Deploy the Docker image to the GKE cluster
+      - name: Deploy
+        run: |-
+          kubectl set image deployment/$DEPLOYMENT_NAME web-editor-app=index.docker.io/$IMAGE:$GITHUB_SHA
+          kubectl get services -o wide
+