ci: add a workflow to generate release

Signed-off-by: Phoeniix Zhao <[email protected]>

.github/workflows/release.yml

@@ -0,0 +1,46 @@
+name: release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+env:
+  IMAGE_ID: ghcr.io/xline-kv/xline-operator
+
+jobs:
+  build:
+    name: Upload Release Asset
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          token: ${{ secrets.GH_TOKEN }}
+          submodules: recursive
+      - name: Build xline operator image
+        run: |
+          make docker-build IMG=${{ env.IMAGE_ID }}:${{ github.ref }}
+      - name: Login to GHCR
+        if: startsWith(matrix.job.platform, 'linux/')
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: xline-kv
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Push docker image to GHCR
+        run: |
+          make docker-push IMG=${{ env.IMAGE_ID }}:${{ github.ref }}
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: false