fix: update contributing guide

CONTRIBUTING.md

@@ -3,61 +3,26 @@
 This project is open source.
 All contributions are welcome.
 
-## Set up development environment (fast)
+## Set up development environment
 
-If you just want to edit the docs, or make a few small changes to the code,
-and you have Python 3.8, 3.9, 3.10, 3.11, or 3.12 installed,
-run these commands to install the dependencies:
+This project uses [`uv`](https://docs.astral.sh/uv/) for package and tool management
+and [`nox`](https://nox.thea.codes/en/stable/index.html) to define tasks,
+such as building the docs or running tests.
 
-```sh
-pip install -U nox poetry
+To install `nox` with `uv`, run:
 
-# Run nox session, for example, to build the docs
-nox -s docs -p 3.12
+```sh
+uv tool install nox
 ```
 
-Replace the Python version with the one that's installed on your system.
-
-## Set up development environment (reproducible, isolated)
-
-It's best if you set up a reproducible development environment,
-where all applications are as isolated as possible.
-
-1. To run specific versions of Python, install a Python version manager,
-   such as `pyenv` or `mise`.
-
-1. Install a specific Python version, for example, with `mise`:
-
-   ```sh
-   mise install [email protected]
-   ```
-
-1. Specify a Python version, either locally or globally.
+## Run sessions
 
-1. Install `pipx` to install Python applications into isolated environments.
+To list the available sessions, run: `nox -ls`.
+To run a specific session, run: {samp}`nox -s {SESSION}`,
+append `-p 3.13` to run the session only with the latest supported Python version.
 
-   ```sh
-   pip install -U pipx
-   ```
+For example, to build the docs with Python 3.13 and start a server for a live preview, run:
 
-1. Install `Poetry` and `Nox`:
-
-   ```sh
-   pipx install poetry
-   pipx install nox
-   ```
-
-## Tools
-
-This project uses [Poetry](https://python-poetry.org/) to build Python packages and manage dependencies.
-
-This project uses [Nox](https://nox.thea.codes/en/stable/) to run tasks,
-such as linting, testing, and building the docs,
-in isolated virtual environments.
-This makes running these tasks more predictable.
-All asks are defined in the file `noxfile.py` as _sessions_.
-
-To get an overview over all defined sessions, run `nox -ls`.
-To run a specific session, run {samp}`nox -s {SESSION}`.
-
-To build the docs and start a development server, run `nox -s docs -p 3.12 -- --live`.
+```sh
+nox -s docs -p 3.13 -- --live
+```

noxfile.py

@@ -13,7 +13,7 @@
 
 nox.options.stop_on_first_error = True
 nox.options.default_venv_backend = "uv"
-nox.options.sessions = ["tests", "typecheck"]
+nox.options.sessions = ["tests", "typecheck", "docs"]
 
 python_versions = ["3.9", "3.13"]