ci: Add Docker build and push workflow for automated releases

.github/workflows/docker-build-push.yml

@@ -0,0 +1,34 @@
+name: Docker Build and Push
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v1
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Login to DockerHub
+      uses: docker/login-action@v1
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Build and push
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        push: true
+        platforms: linux/amd64,linux/arm64
+        tags: |
+          fosslight/fosslight_scanner:latest
+          fosslight/fosslight_scanner:${{ github.event.release.tag_name }}