github: add deployment workflow

Author: x1unix

.github/workflows/master.yml

@@ -20,9 +20,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set Release Version
-        run: echo ::set-env name=RELEASE_VERSION::${GITHUB_REF#refs/*/}
-      - name: Test
+      - name: Set release version
+        run: echo ::set-env name=RELEASE_VERSION::${GITHUB_REF#refs/*/v}
+      - name: Build Docker image
         run: |
-          echo $RELEASE_VERSION
-          echo ${{ env.RELEASE_VERSION }}
+          make docker-image TAG=${{ env.RELEASE_VERSION }} GTAG=${{ secrets.GTAG }}
+      - name: Deploy image to Docker hub
+        run: |
+          make docker-push-image TAG=${{ env.RELEASE_VERSION }} \
+            DOCKER_USER=${{ secrets.DOCKER_USER }} \
+            DOCKER_PASS=${{ secrets.DOCKER_PASS }}

docker.mk

@@ -2,7 +2,14 @@ DOCKERFILE ?= ./build/Dockerfile
 IMG_NAME ?= x1unix/go-playground
 
 .PHONY: docker
-docker: docker-login docker-image
+docker: docker-image docker-push-image
+	@echo "[✓] Done"
+
+.PHONY: docker-push-image
+docker-push-image: docker-login
+	@if [ -z "$(TAG)" ]; then\
+		echo "required parameter TAG is undefined" && exit 1; \
+	fi;
 	@echo "- Pushing $(IMG_NAME):$(TAG) (as latest)..."
 	docker push $(IMG_NAME):$(TAG)
 	docker push $(IMG_NAME):latest