update prod deployments to use dockerhub image

Author: Mubangizi

.github/workflows/prod.yml

@@ -14,6 +14,8 @@ jobs:
       tag: ${{ steps.export.outputs.tag }}
 
     runs-on: ubuntu-latest
+    env:
+      image: cranecloud/monitoring-api
 
     steps:
       - name: Checkout
@@ -24,27 +26,19 @@ jobs:
       - name: Install (Buildx)
         uses: docker/setup-buildx-action@v3
 
-      - name: Login (GCP)
-        uses: google-github-actions/auth@v2
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
         with:
-          credentials_json: ${{ secrets.CREDENTIALS_JSON }}
-
-      - name: Install (Gcloud)
-        uses: google-github-actions/setup-gcloud@v1
-        with:
-          project_id: crane-cloud-274413
-          install_components: "gke-gcloud-auth-plugin"
-
-      - name: Login (GCR)
-        run: gcloud auth configure-docker
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - id: meta
         name: Tag
         uses: docker/metadata-action@v3
         with:
           flavor: |
             latest=true
-          images: gcr.io/crane-cloud-274413/monitoring-api
+          images: ${{ env.image }}
           tags: |
             type=ref,event=branch
             type=ref,event=pr