Node.js Express API Containerization

Problem/Feature Description

A team is building a Node.js/Express API (TypeScript) for a product catalog service. The API will be deployed to a Kubernetes cluster. They need a Dockerfile to containerize the application.

The API has these endpoints:

• GET /api/products — List all products with optional category filter
• GET /api/products/:id — Get a single product by ID
• POST /api/products — Create a new product (accepts: name, description, price_cents, category)
• GET /health — Health check endpoint

The project uses TypeScript and compiles to JavaScript via npm run build (outputs to dist/). Dependencies are managed with npm and defined in package.json and package-lock.json. The application entry point after compilation is dist/index.js and it listens on the port specified by the PORT environment variable (default 3000).

Output Specification

Produce:

• output/Dockerfile — Production-ready Dockerfile for the API
• output/.dockerignore — Docker ignore file
• Any other files needed for a complete containerization setup

The Dockerfile should be production-ready. No placeholders or TODO comments.