FAHAQ

Dockerfile Generator

Build a clean Dockerfile from a simple form.

Dockerfile
FROM node:20-alpine
WORKDIR /app
COPY . .
RUN npm ci
RUN npm run build
EXPOSE 3000
CMD ["npm", "start"]

Free online Dockerfile generator. Fill in the base image, working directory, copy path, run commands, exposed port and start command to get a ready-to-use Dockerfile. Everything is generated in your browser.

How to use the Dockerfile Generator

  1. 01Choose a base image and working directory.
  2. 02Add your COPY path and RUN commands (one per line).
  3. 03Set the exposed port and start command, then copy the Dockerfile.

Frequently asked questions

Should CMD use the array form?

Yes — the exec form (CMD ["npm", "start"]) is recommended because it runs your process directly without a shell. This generator produces that form automatically.

Why choose an alpine base image?

Alpine variants are much smaller than full distributions, which means faster pulls and a smaller attack surface. Use a full image if you need extra system libraries.