featue: try to add docker image auto-build

.github/workflows/build-docker.yml

@@ -0,0 +1,24 @@
+name: build our image
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v2
+      - name: install buildx
+        id: buildx
+        uses: crazy-max/ghaction-docker-buildx@v1
+        with:
+          version: latest
+      - name: login to docker hub
+        run: echo "${{ secrets.PINRY_DOCKER_PASSWORD }}" | docker login -u "${{ secrets.PINRY_DOCKER_USERNAME }}" --password-stdin
+      - name: build the image
+      run: |
+        bash docker/build_docker_multiple_platform.sh