add support for running validator in docker

.dockerignore

@@ -0,0 +1,12 @@
+node_modules
+dist
+.git
+.github
+.circleci
+*.md
+LICENSE
+.gitignore
+sample
+*.log
+.DS_Store
+coverage

.github/workflows/ci.yml

@@ -15,3 +15,20 @@ jobs:
           node-version: 20
       - run: npm install
       - run: npm test
+
+  docker-smoke-test:
+    name: Docker Smoke Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@main
+      - name: Build Docker image
+        run: docker build -t bev-test .
+      - name: Test valid catalog-info
+        run: docker run --rm -v ${{ github.workspace }}/sample:/workdir bev-test catalog-info.yml
+      - name: Test invalid catalog-info fails
+        run: |
+          if docker run --rm -v ${{ github.workspace }}/sample:/workdir bev-test invalid-catalog-info.yml; then
+            echo "Expected validation to fail but it passed"
+            exit 1
+          fi

.github/workflows/docker-publish.yml

@@ -0,0 +1,33 @@
+name: docker-publish
+on:
+  push:
+    branches:
+      - main
+jobs:
+  publish:
+    name: docker-publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Get version from package.json
+        id: version
+        run: echo "VERSION=$(node -p "require('./package.json').version")" >> $GITHUB_OUTPUT
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - 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.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            roadiehq/backstage-entity-validator:${{ steps.version.outputs.VERSION }}
+            roadiehq/backstage-entity-validator:latest

Dockerfile

@@ -0,0 +1,35 @@
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package.json yarn.lock ./
+
+# Install all dependencies (including devDependencies for build)
+RUN yarn install --frozen-lockfile --ignore-scripts
+
+# Copy source files
+COPY src/ ./src/
+COPY bin/ ./bin/
+
+# Build the project
+RUN yarn run prepare
+
+# Production stage
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Copy built files from builder (ncc bundles all dependencies)
+COPY --from=builder /app/dist/ ./dist/
+
+# Create a directory for mounting files to validate
+RUN mkdir /workdir
+WORKDIR /workdir
+
+# Set the entrypoint to the validator
+ENTRYPOINT ["node", "/app/dist/index.js"]
+
+# Default to showing help (no args will validate current directory)
+CMD []

README.md

@@ -74,6 +74,27 @@ usage:
             path: catalog-info.yaml
 ```
 
+## Docker
+
+The validator is available as a Docker image at `roadiehq/backstage-entity-validator`.
+
+### Usage
+
+```bash
+# Validate a file in the current directory
+docker run --rm -v $(pwd):/workdir roadiehq/backstage-entity-validator catalog-info.yaml
+
+# Validate multiple files
+docker run --rm -v $(pwd):/workdir roadiehq/backstage-entity-validator catalog-info.yaml other-file.yaml
+
+# Validate with glob pattern
+docker run --rm -v $(pwd):/workdir roadiehq/backstage-entity-validator "services/*/catalog-info.yaml"
+```
+
+### Available Tags
+
+- `latest` - Latest release
+- `x.y.z` - Specific version (e.g., `0.6.2`)
 
 ## Using the CLI