DevOps

Dockerfile Generator

Scaffold production-ready Dockerfiles, Compose setups, and .dockerignore files. Optimize container size and enforce runtime security constraints instantly.

Options

# Stage 1: Build base
FROM node:20-alpine AS base
WORKDIR /app
COPY package*.json ./
RUN npm ci

# Stage 2: Builder
FROM base AS builder
WORKDIR /app
COPY . .
RUN npm run build

# Stage 3: Runner
FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV PORT 3000
RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 nextjs
USER nextjs

COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package*.json ./
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/public ./public

EXPOSE 3000
CMD ["npm", "start"]

How to Use

  1. 1

    Select Runtime

    Choose your target language/framework (Node.js, Go, Python, Static).

  2. 2

    Configure Details

    Specify port numbers, base images, and add any environment variables.

  3. 3

    Toggle Security

    Enforce multi-stage optimization and non-root execution rules with checkboxes.

  4. 4

    Export configs

    Switch between tabs to copy the Dockerfile, docker-compose.yml, or .dockerignore.

Frequently Asked Questions

What is a multi-stage Docker build?+

Multi-stage builds use multiple FROM instructions in a Dockerfile. It allows you to build code in a heavy base environment (builder stage) and then copy ONLY the compiled binaries/artifacts into a tiny runner base, drastically reducing image size.

Why run containers as a non-root user?+

By default, Docker containers run as root. If an attacker escapes the container, they would gain root privileges on the host server. Enforcing non-root execution restricts this risk.

Is there any charge for using this Docker generator?+

No, Toolforge templates are 100% free, open, and run locally in your web browser.