👷 add RC workflow

.github/workflows/docker-release.yml

@@ -0,0 +1,117 @@
+name: Docker CI/CD
+# This workflow is designed to build a Docker image, upload it to Docker Hub,
+# and create a GitHub release with the image tar file every time there's a commit
+# on branches other than 'main'.
+on:
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: "Branch to pull from"
+        required: false
+
+  pull_request: 
+    types: closed
+    branches:
+      - "!main"
+      - "releases/**"
+    paths-ignore: [ "./github" ]
+
+env:
+  REGISTRY: docker.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    if: github.event.pull_request.merged == true
+    outputs:
+      image_tag: ${{ steps.set_image_tag.outputs.IMAGE_TAG }}
+      ref: ${{ steps.set_ref.outputs.ref }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Determine ref
+        id: set_ref
+        run: |
+          if [[ ${{ github.event.inputs.ref }} ]]; then
+            echo "ref=${{ github.event.inputs.ref }}" >> $GITHUB_OUTPUT
+          else
+            echo "ref=${{ github.ref_name }}" >> $GITHUB_OUTPUT
+          fi
+        shell: bash
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ steps.set_ref.outputs.ref }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.DOCKER_REGISTRY_USER }}
+          password: ${{ secrets.DOCKER_REGISTRY_PASSWD }}
+
+      - name: Determine IMAGE_TAG
+        id: set_image_tag
+        run: |
+          if [[ ${{ github.event.inputs.tag }} ]]; then
+            echo "IMAGE_TAG=${{ github.event.inputs.ref }}_RC-${sha}" >> $GITHUB_OUTPUT
+          else
+            sha=$(git rev-parse --short HEAD)
+            echo "IMAGE_TAG=${{ steps.set_ref.outputs.ref }}_RC-${sha}" >> $GITHUB_OUTPUT
+          fi
+        shell: bash
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.set_image_tag.outputs.IMAGE_TAG }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+  create-release:
+    needs: build-and-push
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.build-and-push.outputs.ref }}
+
+      - name: Load Docker image
+        run: |
+          docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ needs.build-and-push.outputs.image_tag }}
+          docker save ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ needs.build-and-push.outputs.image_tag }} > image.tar
+      
+      - name: Upload Docker image as artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: docker-image
+          path: image.tar
+
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ needs.build-and-push.outputs.image_tag }}
+          release_name: Release ${{ needs.build-and-push.outputs.image_tag }}
+          draft: false
+          prerelease: false
+          body: "Release of ${{ env.IMAGE_NAME }}:${{ needs.build-and-push.outputs.image_tag }}"
+
+      # - name: Upload Docker image to GitHub Release
+      #   uses: actions/upload-release-asset@v1
+      #   env:
+      #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      #   with:
+      #     upload_url: ${{ steps.create_release.outputs.upload_url }}
+      #     asset_path: ./image.tar
+      #     asset_name: docker-image-${{ needs.build-and-push.outputs.image_tag }}.tar
+      #     asset_content_type: application/octet-stream