Node.js

What the generated Dockerfile does for a Node.js project, when you set no build or start command.

Base image. The image is node:<major>-alpine. A Bun project uses oven/bun:1-alpine.

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The Node.js Dockerfile

The defaults

Step	What Ferry does
Node.js version	It comes from `engines.node` in `package.json`. Ferry uses 22 when the range allows it. If not, Ferry uses the newest major version that the range allows.
Package manager	The package manager comes from the `packageManager` field or the lockfile: npm, Yarn, pnpm or Bun. Yarn and pnpm run through Corepack.
Install with npm	`npm ci` when there is a `package-lock.json`. If not, `npm install`.
Build	The `build` script of `package.json`, if there is one.
Start	`npm start` when there is a `start` script. With Yarn 2+: `yarn start`. With Bun: `bun run start`.
Start with no `start` script	`node` with the `main` file, `server.js`, `index.js` or `app.js`.

Deploy log

==> Start command: npm start (the "start" script of package.json)