Release docker image for arm64.

.github/workflows/test.yml

@@ -2,17 +2,38 @@ name: Test image build
 
 on:
   pull_request:
-    branches: [ master ]
+  push:
+    branches:
+      - master
+    tags:
+      - v*
 
 jobs:
-  build:
-    name: Build docker image
-
+  publish:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
+      - uses: actions/checkout@v2
+      - name: Prepare
+        id: prepare
+        run: |
+            TAG=${GITHUB_REF##*/}
+            echo ::set-output name=tag_name::${TAG}
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login do docker.io
+        run: docker login -u amidos -p ${{ secrets.DOCKER_TOKEN }}
+      - name: build and publish image
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            amidos/dcind:${{ steps.prepare.outputs.tag_name }}
+            amidos/dcind:latest
 
-      - name: Build
-        run: docker build .