Docker: Choose a specific Node.js version

This documentation is part of the Node.js guide. You can view the complete guide here: How to use and deploy a Node.js app with Docker.

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If you wish to specify a different Node.js version, follow these steps:

1. Open the file docker/my-app.dockerfile, which defines the Docker image for your app.
2. Locate the first line that reads FROM node:<version>-alpine.
3. Replace <version> with your chosen Node.js version. It is recommended to use the Long-Term Support (LTS) version. You can check the latest LTS version on the Node.js website. For example, to use the latest LTS version (currently 22), update the line to FROM node:22-alpine. If you prefer a specific version number, you can use something like FROM node:22.13.0-alpine.
4. Save your changes to the Dockerfile.