add github actions workflow to build docker images

.github/workflows/docker-images.yml

@@ -0,0 +1,82 @@
+name: docker-images
+
+on:
+  push:
+    branches: 
+    - master
+    - docker-test
+  pull_request:
+    branches: 
+    - master
+    - docker-test
+
+jobs:
+  multi:
+            
+    runs-on: ubuntu-latest
+    steps:
+      - 
+        name: Determin docker tag
+        env:
+          TAG_NAME: ${{ github.ref }}
+        run: |
+          if [ "${TAG_NAME##*/}" = "master" ]; then
+            tag=latest
+          else
+            tag=build-test
+          fi
+          echo "::set-env name=docker_tag::${tag}"
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: arm64
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Cache Docker layers
+        uses: actions/cache@v2
+        if: github.event_name == 'push'
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-mirrorweb-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-mirrorweb-
+      -
+        name: Cache Docker layers
+        uses: actions/cache@v2
+        if: github.event_name == 'pull_request'
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-pr-${{ github.event.pull_request.head.user.login }}-buildx-mirrorweb-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-pr-${{ github.event.pull_request.head.user.login }}-buildx-mirrorweb-
+            ${{ runner.os }}-buildx-mirrorweb-
+      -
+        name: Cache Docker layers
+        if: github.event_name != 'push' && github.event_name != 'pull_request'
+        run: |
+          echo "I do not know how to setup cache"
+          exit -1
+      -
+        name: Login to DockerHub
+        uses: docker/login-action@v1 
+        if: github.event_name == 'push'
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: Dockerfile.build
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name == 'push' }}
+          tags: tunathu/mirror-web:${{ env.docker_tag }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache