gh actions workflow for dockerhub image build on release

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: ci
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/arm/v7,linux/arm64/v8,linux/amd64,linux/386
+          push: true
+          tags: filegator/filegator:latest, filegator/filegator:${{ github.ref_name }}