Update CI Workflow for Conditional Docker Image Push

- Modified the CI workflow to separate the Docker image build and push actions
- Introduced a conditional step for pushing: images are now only pushed if the tag does not contain `-rc`
- Ensures that all tagged images, including `-rcX` versions, are built, but only stable releases are pushed
- Enhances flexibility and control over the release process in the CI pipeline

.github/workflows/docker.yml

@@ -11,16 +11,28 @@ jobs:
     steps:
       - name: checkout code
         uses: actions/checkout@v2
+
       - name: install buildx
         id: buildx
         uses: crazy-max/ghaction-docker-buildx@v1
         with:
           version: latest
+
       - name: login to docker hub
         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
-      - name: build and push the image
+
+      - name: build the image
+        run: |
+          docker buildx build \
+            --tag brotandgames/ciao:$(cat ./public/version) \
+            --platform linux/amd64,linux/arm/v7,linux/arm64 \
+            --load
+
+      - name: push the image
+        if: "!contains(github.ref, '-rc')"
         run: |
           docker buildx build --push \
             --tag brotandgames/ciao:$(cat ./public/version) \
             --tag brotandgames/ciao:latest \
             --platform linux/amd64,linux/arm/v7,linux/arm64 .
+