Add GitHub Actions workflow for building and pushing Docker images

.github/workflows/docker-publish.yml

@@ -0,0 +1,49 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    tags:
+      - '*' # Triggers on any tag push
+
+env:
+  REGISTRY: docker.io
+  IMAGE_NAME: ${{ secrets.DOCKERHUB_USERNAME }}/actual-rest-api
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract tag name
+        id: tag
+        run: |
+          TAG_NAME=${GITHUB_REF#refs/tags/}
+          echo "tag=$TAG_NAME" >> $GITHUB_OUTPUT
+          echo "Tag name: $TAG_NAME"
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.tag.outputs.tag }}
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+