DevOps

Docker Generator

Create a Dockerfile, a docker run command or a full docker-compose.yml from a simple form — no need to remember every flag and YAML key.

Configuration

Copying these before your code lets Docker cache the install step.

One command per line — each becomes a RUN instruction.

Separate several ports with spaces, e.g. 3000 9229.

Written in exec form, e.g. CMD ["npm", "start"]. Use quotes for arguments with spaces.

Dockerfile

Save this as Dockerfile in your project root, then run docker build -t my-app .
FROM node:22-alpine

WORKDIR /app

COPY package*.json ./

RUN npm ci

COPY . .

EXPOSE 3000

CMD ["npm", "start"]

Quick tips

  • Copy dependency files before your code so rebuilds reuse the cached install layer.
  • Alpine and slim images are much smaller than the full ones.
  • Add a .dockerignore that excludes node_modules, .git and .env files.
  • Run as a non-root user in production (the Node images ship with a “node” user).

  • Three generators

    Dockerfile, docker run and Docker Compose in one place. Switching tabs keeps what you typed.

  • Catches mistakes

    Flags bad port mappings, undeclared networks and volumes, unknown depends_on services and more.

  • Copy or download

    Copy the result or download a ready-to-use Dockerfile or docker-compose.yml.

Free Dockerfile and Docker Compose generator

Docker packages your app with everything it needs to run, so it works the same on your laptop, a VPS or a client's server. This generator writes the three files and commands you use most, so you can focus on your app instead of syntax.

What each tab does

  • Dockerfile: pick a base image, set the working directory, install steps, exposed port and start command. Dependency files are copied first so Docker can cache the install layer.
  • docker run: build a one-line command with ports, volumes, environment variables, network, restart policy and memory/CPU limits. Values with spaces are quoted for bash and zsh.
  • Docker Compose: define several services with ports, environment, volumes, depends_on, networks, restart policy, healthchecks, build settings and resource limits.

How to use it

  1. Choose a tab and fill in the form — the output updates as you type.
  2. Fix anything listed under “Check these before you use it”.
  3. Copy or download the result. Build with docker build -t my-app . or start a stack with docker compose up -d.

Good habits

  • Add a .dockerignore so node_modules, .git and .env files never end up in your image.
  • Keep secrets out of Dockerfiles and committed compose files — use an .env file or your host's secret manager.
  • Quote port mappings in YAML (the generator does this for you) — unquoted values like 22:22 can be misread as numbers.

Private by design. Everything runs in your browser — nothing you enter is uploaded or stored by AISeekho.

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