Dockergen

Dockergen is a CLI tool for generating optimized Dockerfile/Containerfile templates for common runtimes.

Usage

Usage:
    dockergen [command]

Available Commands:
    autogen     Auto-detect project and generate a Dockerfile/Containerfile
    generate    Interactively generate a Dockerfile/Containerfile
    help        Help about any command

Flags:
    -h, --help   help for dockergen

Use "dockergen [command] --help" for more information about a command.

dockergen generate

Interactively generate a Dockerfile/Containerfile

Usage:
    dockergen generate [flags]

Flags:
            --alpine                   Use Alpine-based images when supported (default true)
            --app string               Application name
            --build string             Build command (optional)
    -h, --help                     help for generate
            --lang string              Runtime language (node|python)
            --no-expose                Do not include EXPOSE instruction
            --node-version string      Node.js version (e.g. 20)
            --output string            Output file path (default: Dockerfile)
            --package-manager string   Node.js package manager (npm|yarn|pnpm)
            --port int                 Application port to expose
            --python-version string    Python version (e.g. 3.12)
            --requirements string      Python requirements file name (default "requirements.txt")
            --start string             Start command
            --workdir string           Work directory inside container (default "/app")

dockergen autogen

Auto-detect project and generate a Dockerfile/Containerfile

Usage:
    dockergen autogen [flags]

Flags:
            --alpine                   Use Alpine-based images when supported (default true)
            --app string               Application name
            --build string             Build command (optional)
    -h, --help                     help for autogen
            --no-expose                Do not include EXPOSE instruction
            --node-version string      Node.js version (e.g. 20)
            --output string            Output file path (default: Dockerfile)
            --package-manager string   Node.js package manager (npm|yarn|pnpm)
            --port int                 Application port to expose
            --python-version string    Python version (e.g. 3.12)
            --requirements string      Python requirements file name
            --start string             Start command
            --workdir string           Work directory inside container (default "/app")

Install

go install github.com/frsfahd/dockergen@latest

Make sure your $GOPATH/bin (or $HOME/go/bin) is in your PATH.

Features

• generate : generate dockerfile/containerfile via interactive user prompt
• autogen : generate dockerfile/containerfile automatically based on detected framework & language of the project

Language & Framework Support

• Node.js :
  • Next.js
  • Vite
  • Express.js
  • Hapi
  • Fastify
• Python :
  • Flask
  • Fastapi
  • Django

see internal/catalog/languages.go