Add github action to build multi-arch docker image and publish to docker hub

Author: yangyaofei

.github/workflows/build.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    # Sequence of patterns matched against refs/tags
+    tags:
+      - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+name: Docker build
+
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      - id: get_version
+        uses: battila7/get-version-action@v2
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: nlpir/libreoffice:${{ steps.get_version.outputs.version-without-v }}