add github action to push image when release is published

added a github action to build and push the docker image
to quay when release is published

Signed-off-by: Madhu Rajanna <[email protected]>

Author: Madhu-1

.github/workflows/docker-publish.yaml

@@ -0,0 +1,48 @@
+name: Publish Docker image
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  push:
+    name: Push Image
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        go: ["1.15"]
+    steps:
+    - uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go }}
+
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Login to Quay
+      uses: docker/login-action@v1
+      with:
+        registry: quay.io
+        username: ${{ secrets.QUAY_USERNAME }}
+        password: ${{ secrets.QUAY_PASSWORD }}
+
+    - name: copy volume-replication-operator repo in go src
+      run: |
+        mkdir -p /home/runner/go/src/github.com/csi-addons
+        cp -r /home/runner/work/volume-replication-operator/volume-replication-operator /home/runner/go/src/github.com/csi-addons
+
+    - name: run docker-push
+      working-directory: "/home/runner/go/src/github.com/csi-addons/volume-replication-operator"
+      env:
+        GOPATH: /home/runner/go
+      run: |
+        export PATH=$PATH:$GOPATH/bin
+        export VERSION="2.3.2"
+        wget https://github.com/kubernetes-sigs/kubebuilder/releases/download/v"$VERSION"/kubebuilder_"$VERSION"_linux_amd64.tar.gz
+        tar -zxvf kubebuilder_"$VERSION"_linux_amd64.tar.gz
+        export KUBEBUILDER_ASSETS="$(pwd)/kubebuilder_"$VERSION"_linux_amd64/bin"
+        # build and push image with released tag
+        IMG_TAG=${{ github.ref }} make docker-build
+        IMG_TAG=${{ github.ref }} make docker-push