Add Docker hub release workflow

.github/workflows/dockerhub.yaml

@@ -0,0 +1,39 @@
+name: Publish Docker image
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["v*"]
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+
+      - name: Use buildx for multi-platform images
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: materializebot
+          password: ${{ secrets.DOCKER_HUB_MATERIALIZEBOT_API_KEY }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: materialize/datagen
+          tags: |
+            type=semver,pattern={{major}}.{{minor}}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -18,4 +18,4 @@ COPY ./tests ./tests
 RUN npm link
 
 # Set the command to run the application when the container starts
-ENTRYPOINT [ "datagen" ]
+ENTRYPOINT [ "datagen" ]