generate prelease docker image

Signed-off-by: Benny Samir Hierl <bennysamir@posteo.de>

.github/workflows/ci-pre-release.yml

@@ -0,0 +1,85 @@
+name: 'CI'
+
+on:
+  push:
+    branches:
+      - 'release/**'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up NodeJs
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+      - name: Install dependencies
+        run: npm ci
+      - name: Linter
+        run: npm run lint
+      - name: Typecheck
+        run: npm run typecheck
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up NodeJs
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+      - name: Install dependencies
+        run: npm ci
+      - name: Unit tests
+        run: npm run test:unit:ci
+  docker:
+    runs-on: ubuntu-latest
+    needs:
+      - lint
+      - test
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 16
+      - name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=${{ secrets.DOCKER_USERNAME }}/${GITHUB_REPOSITORY#*/}
+          VERSION=$(node -e "console.log(require('./package.json').version);")
+
+          TAGS="${DOCKER_IMAGE}:${VERSION}-pre"
+
+          echo ::set-output name=tags::${TAGS}
+          echo ::set-output name=docker_image::${DOCKER_IMAGE}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@master
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@master
+
+      - name: Available platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
+
+      - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build
+        uses: docker/build-push-action@v2
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.prep.outputs.tags }}