This project demonstrates how to build and run a basic Node.js web app inside a Docker container using a custom Dockerfile.

├── index.js ├── package.json └── Dockerfile

• Runs a Node.js web server using Express
• Built on a lightweight node:alpine image
• Exposes HTTP service on port 3000 inside the container
• Includes Docker DNS alias support for multi-container networking

• Docker installed
• Basic knowledge of Node.js and Docker

mkdir webapp && cd webapp 

 docker build -t mynodeapp . 

docker network create my_custom_net 

docker run -d \ --network my_custom_net \ --network-alias web \ --name nodeapp \ mynodeapp 

docker run --rm --network my_custom_net alpine \ sh -c "apk add --no-cache curl && curl web:3000" 

You should see:

Hello from the custom app container! 

To stop and remove everything:

docker rm -f nodeapp docker network rm my_custom_net 

📝 Dockerfile Reference

🐳 Node.js Official Image

🚀 Express.js Framework

Built with ❤️ by dchak2023