# About this documentation
This guide is built with MarkDown files and [GitBook](https://github.com/GitbookIO/gitbook).
The source code for this documentation is distributed with the source code for the tools, in the `docs/` folder.
If you want to contribute to the documentation, [clone the repository](./getting-started/build.md#getting-the-code), make your changes locally, and then regenerate the book to see how it looks like before submitting a patch:
# Install GitBook locally
npm install -g gitbook-cli
# Go into the docs directory
# Install plugins
# Generate the docs and start a local server
# You can now navigate to localhost:4000 in your browser to see the output
open http://localhost:4000 # this would work in MacOS
# Or build the book only (this places the output into `docs/_book`)