Railpack is a tool for building images from source code with minimal configuration. It is the successor to Nixpacks and incorporates many of the learnings from running Nixpacks in production at Railway for several years.
# Install mise & railpack
curl -sSL https://mise.run | sh
mise install ubi:railwayapp/railpack@latest
# start BuildKit container & let railpack know about it
docker run --rm --privileged -d --name buildkit moby/buildkit
export BUILDKIT_HOST='docker-container://buildkit'
# create a Next.js app
npm create next-app@latest my-app
cd my-app
# build and run the app!
railpack build .
docker run -p 3000:3000 -it my-appRailpack automatically detects the project type (next, in this case, but many languages & frameworks are supported!) and generates an optimized container image.
Note: The above steps are for running Railpack locally to experiment and test. If you deploy on Railway, Railpack runs automatically when you push changes to your repository.
Full documentation for both operators (platforms, like Railway) and users (developers using Railpack to build their applications) is available at railpack.com.
Railpack is open source and open to contributions. See the CONTRIBUTING.md file for more information.