Dockerfile Generator

Generate a production-ready Dockerfile with multi-stage builds, non-root user, and healthcheck best practices.

Language

Node.js runtime with npm. Default port: 3000.

Base image variant

Base image: node:20-alpine

Exposed port

Multi-stage build (builder + runtime stages)Run as non-root userAdd HEALTHCHECK directive

Custom entrypoint (optional, space-separated args)

Dockerfile preview (495 bytes)

# syntax=docker/dockerfile:1

FROM node:20-alpine
WORKDIR /usr/src/app
# OCI image labels for traceability.
LABEL org.opencontainers.image.title="Node.js app"
LABEL org.opencontainers.image.source="https://github.com/example/repo"
LABEL org.opencontainers.image.licenses="MIT"
COPY package.json package-lock.json* ./
RUN npm ci
COPY . ./
# Create a non-root user for runtime least-privilege.
RUN addgroup -S nonroot && adduser -S nonroot -G nonroot
EXPOSE 3000
USER nonroot
CMD ["npm", "start"]