Generate dockerfile

Create a starter production Dockerfile for common languages and package managers.

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ToolDockerfile Generator
Input
Output
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How it works

Language and package-manager choices select a base image, dependency commands, workdir, copy steps, port, and command; compiled options can use builder and runtime stages. The result is Dockerfile text, not a built or scanned image.

  • Slim or Alpine variants reduce starting size.
  • Version, port, and command remain project-specific inputs.

Worked example

Node.js pnpm multi-stage build
Production Dockerfile for Node.js 20 with pnpm, multi-stage build, Alpine base, and non-root user
Input
											Runtime: node
Version: 20
Port: 3000
Multi stage: true
Alpine: true
Package manager: pnpm
Output
												FROM node:20-alpine AS builder
WORKDIR /app
RUN corepack enable
COPY package.json pnpm-lock.yaml ./
RUN pnpm install --frozen-lockfile
COPY . .
RUN pnpm build

FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 appuser
COPY --from=builder --chown=appuser:nodejs /app/dist ./dist
COPY --from=builder --chown=appuser:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=appuser:nodejs /app/package.json ./
USER appuser
EXPOSE 3000
CMD ["node", "dist/index.js"]

When to use this

Web services, language repositories, and CI image builds start from Dockerfiles.

Edge cases

  • A generated command can be wrong for the application entry point.
  • Missing lockfiles weaken dependency reproducibility.
  • Alpine can expose libc compatibility issues for native dependencies.

References