Add Docker release workflow for automated image builds

.dockerignore

@@ -1,4 +1,4 @@
 .env
 .mockery.yaml
 
-configs/secrets*
+configs/secrets*

.github/workflows/docker-release.yml

@@ -0,0 +1,39 @@
+name: Docker Release
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+
+env:
+  DOCKER_IMAGE: thirdweb/indexer
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.DOCKER_IMAGE }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -21,4 +21,4 @@ EXPOSE 8080
 
 ENTRYPOINT ["/bin/app"]
 
-CMD []
+CMD []