ci: add build for multi-platform

.github/workflows/build-and-publish.yml

@@ -0,0 +1,36 @@
+name: Build and Publish Docker Image
+
+on: [push, workflow_dispatch]
+
+jobs:
+  push_to_registry:
+    name: Build and Publish Docker Image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+
+      # Support multiple platforms
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Get current date
+        id: date
+        run: echo "::set-output name=date::$(date +'%Y%m%d')"
+      
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: true
+          tags: dcsunset/taskwarrior-webui:latest,dcsunset/taskwarrior-webui:${{ steps.date.outputs.date }}