Add release pipeline (#3)

Signed-off-by: Tamal Saha <tamal@appscode.com>

.github/workflows/release.yml

@@ -0,0 +1,39 @@
+name: Release
+
+on:
+  create:
+    tags:
+      - '*.*.*'
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v1
+
+    - name: Print version info
+      id: semver
+      run: |
+        make version
+
+    - name: Set up Docker Buildx
+      id: buildx
+      uses: crazy-max/ghaction-docker-buildx@master
+      with:
+        version: latest
+
+    - name: Available platforms
+      run: echo ${{ steps.buildx.outputs.platforms }}
+
+    - name: Build
+      env:
+        DOCKER_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+        USERNAME: 1gtm
+        APPSCODE_ENV: prod
+      run: |
+        docker login --username ${USERNAME} --password ${DOCKER_TOKEN}
+        make release

Makefile

@@ -103,12 +103,12 @@ all-container: $(addprefix container-, $(subst /,_, $(DOCKER_PLATFORMS)))
 all-push: $(addprefix push-, $(subst /,_, $(DOCKER_PLATFORMS)))
 
 version:
-	@echo version=$(VERSION)
-	@echo version_strategy=$(version_strategy)
-	@echo git_tag=$(git_tag)
-	@echo git_branch=$(git_branch)
-	@echo commit_hash=$(commit_hash)
-	@echo commit_timestamp=$(commit_timestamp)
+	@echo ::set-output name=version::$(VERSION)
+	@echo ::set-output name=version_strategy::$(version_strategy)
+	@echo ::set-output name=git_tag::$(git_tag)
+	@echo ::set-output name=git_branch::$(git_branch)
+	@echo ::set-output name=commit_hash::$(commit_hash)
+	@echo ::set-output name=commit_timestamp::$(commit_timestamp)
 
 gen:
 	./hack/codegen.sh