Add nightly docker build workflow (#141)

* no --all-tags for nightly build

add nightly docker build workflow

add nightly docker build workflow

remove kubebuilder

update to workflow

* change docker build tag to repo revision

.github/workflows/test-job.yaml

@@ -90,6 +90,10 @@ jobs:
         wget https://github.com/kubernetes-sigs/kubebuilder/releases/download/v3.0.0/kubebuilder_$(go env GOOS)_$(go env GOARCH)
         sudo mv kubebuilder_$(go env GOOS)_$(go env GOARCH) /usr/local/bin/kubebuilder
 
+    - name: Get revision SHA
+      id: vars
+      run: echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
+
     - name: Get dependencies
       working-directory: ${{env.working-directory}}
       run: go mod download
@@ -106,8 +110,23 @@ jobs:
       uses: docker-practice/actions-setup-docker@master
 
     - name: Build Docker Image
-      run: make docker-image
+      run: IMG=kuberay/operator:${{ steps.vars.outputs.sha_short }} make docker-image
+      working-directory: ${{env.working-directory}}
+
+    - name: Log in to Docker Hub
+      uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+      if: ${{ github.ref == 'refs/heads/master' }}
+
+    - name: Push to DockerHub
+      run: |
+        docker push kuberay/operator:${{ steps.vars.outputs.sha_short }};
+        docker image tag kuberay/operator:${{ steps.vars.outputs.sha_short }} kuberay/operator:nightly;
+        docker push kuberay/operator:nightly
       working-directory: ${{env.working-directory}}
+      if: ${{ github.ref == 'refs/heads/master' }}
 
     - name: Build CLI
       run: go build -o kuberay -a main.go