Added workflow to build & publish image (#53)

.github/workflows/docker.yml

@@ -0,0 +1,28 @@
+name: Build & Publish Docker Image
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build & Push
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: ${{ secrets.DOCKER_REGISTRY }}:${{ github.ref_name }}