Dockerfile Generator

Generate production-ready Dockerfiles with multi-stage builds, non-root users, and healthchecks.

Free & unlimited

Base image

Language / stack

Image tag

Port

Working directory

Build options

Multi-stage buildRun as non-root user

Add HEALTHCHECK instruction

Instructions (COPY / RUN / ADD)

TypeValue

Environment variables (ENV)

KeyValue

Dockerfile

# Stage 1: build
FROM node:20-slim AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev
COPY . .
# Stage 2: runtime
FROM node:20-slim AS runner
WORKDIR /app
# Non-root user
RUN addgroup --system --gid 1001 appgroup && \
    adduser --system --uid 1001 --ingroup appgroup appuser
COPY . .
ENV NODE_ENV=production
USER appuser
EXPOSE 3000
CMD ["node", "server.js"]

All processing happens in your browser. No data is sent to any server.

About this tool

1
Choose base image
Select your language/runtime: Node.js, Python, Go, .NET, etc.
2
Configure options
Enable multi-stage builds, non-root user, set ports and env vars.
3
Language options
Set package manager, caching layers, and build commands for your stack.
4
Copy or download
Copy the Dockerfile and .dockerignore, or download as files.

Multi-stage builds produce much smaller final images by separating build and runtime stages.
Always use a non-root user in production containers for security.
Copying package.json before source code enables Docker layer caching for faster builds.