Dockerfile Generator & Multi-Stage Builder

Generate optimized, production-ready, multi-stage Dockerfiles for Node.js, Python, Go, Rust, PHP, and static web apps.

Dockerfile Generator & Multi-Stage Builder

Generate optimized, production-ready, multi-stage Dockerfiles for Node.js, Python, Go, Rust, PHP, and static web apps.

Runtime Stack:

Package Manager:

Container Port:

Non-root user security

Generated Dockerfile:

# Stage 1: Dependencies & Build
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

# Stage 2: Production Runner
FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 nextjs
USER nextjs

COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

EXPOSE 3000
ENV PORT=3000
CMD ["node", "server.js"]

About This Tool

The Dockerfile Generator creates lightweight, security-hardened container configurations using official Alpine/Debian slim base images, multi-stage builds, non-root user execution, and dependency caching layers.

Key Features

Multi-stage build optimization to minimize container image size

Presets for Node.js (Next.js, Express), Python (FastAPI, Django), Go, Rust, PHP, and Nginx HTML

Non-root security hardening user setup

Production-ready caching with package.json / requirements.txt separation

How to Use This Tool

Select your runtime stack (e.g., Node.js Next.js, Python FastAPI, Go, Rust).
Configure port number and package manager (npm, pnpm, yarn, pip, cargo).
Toggle multi-stage optimization and non-root security mode.
Copy the generated Dockerfile to your project root.

Why Use This Tool

Slash Docker image sizes from 1GB+ down to <100MB with multi-stage artifacts.
Prevent container privilege escalation by creating dedicated non-root users.

Pro Tips

Always copy dependency manifests before source code to maximize Docker layer cache efficiency.

Frequently Asked Questions

Why should I use multi-stage Docker builds?

Multi-stage builds allow you to compile code using heavy build tools in an intermediate stage, then copy only the finalized binary/bundle into a minimal runtime image, reducing image size by up to 90%.

Why should containers run as non-root users?

Running as non-root mitigates container breakout vulnerabilities, ensuring an attacker cannot gain host-level root privileges even if application code is compromised.

Dockerfile Generator & Multi-Stage Builder