Tool reference

Dockerfile Generator

beta

Generate optimized, secure, multi-stage production Dockerfiles for Node.js, Python, Go, and static HTML SPA projects.

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Quickstart

Use this when you want the shortest path from input to a useful result.

Select the runtime environment (Node, Python, Go, Nginx).

Configure version, port, build commands, and variables.

Copy the generated Dockerfile or download it directly.

Best for

Common situations where this tool fits naturally into the workflow.

Generate a multi-stage Dockerfile for a Next.js or Vite React app to keep image sizes tiny.
Draft a production container manifest for a Python FastAPI api.
Build a compiled, minimal container for a Go service.

Common tasks

Concrete ways this tool is typically used in day-to-day workflows.

Generate a multi-stage Node.js Dockerfile

Select Node.js, ensure 'Multi-stage Build' is enabled. This builds the assets in a builder container, and copies only files needed for runtime.

Add environment variables to Docker image

Click '+ Add Variable', enter keys (e.g. PORT) and values. They are appended as ENV declarations in the final image stage.

Configure static frontend container

Select Nginx, configure the port. This creates a Dockerfile that copies build outputs to /usr/share/nginx/html and binds Nginx server configs.

Examples

Real inputs and outputs that show how the tool behaves.

Simple Node Dockerfile

Non-multistage Node environment.

Configuration

Runtime: Node, Version: 20-alpine, Port: 3000, Multi-stage: False

Dockerfile output

FROM node:20-alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "start"]

Features

What this tool includes and what each capability is for.

Runtime templates

Configured base rules for popular developer frameworks.

Multi-stage builds

Isolates compile steps from clean runtime environments.

Monaco compiler

Real-time updates of docker manifest code.

Variable mappings

Inject environment values directly into the image build steps.

Workflow

Follow this path to get from input to output quickly.

Choose your language/runtime from the options dropdown.

Adjust ports, base images, build dependencies, and add env variables.

Download the completed Dockerfile to your project root.

Caveats and tips

Things to keep in mind before relying on the output in a larger workflow.

Caveats

The dry run preview is a browser-side simulation. It does not execute Docker, BuildKit, or verify that your project files build successfully.
Custom run scripts must be specified as comma-separated values (e.g., node,dist/index.js) to compile correctly into JSON command arrays.
Ensure your project has the required build files (package.json, requirements.txt, go.mod) before building the image.

Tips

Always prefer multi-stage builds for compiled languages or frontend builds (Vite, Next.js) to exclude massive devDependencies from the final container.
Use alpine or slim variants (e.g. node:20-alpine) to start with a tiny base image foot-print.