How do you use Docker with Node.js?

Short answer: Docker packages your app and its environment into a container for consistent deployment. Basic steps: Create a Dockerfile: FROM node:18 WORKDIR /app COPY package*.json ./ RUN npm install --production COPY . . CMD ["node", "app.js"] Build and run the container: docker build -t my-node-app . docker run -p 3000:3000 my-node-app

Real-world example (ShopNest)

A ShopNest BFF in Node.js aggregates catalog and price APIs for the React storefront.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.