Update justfile and documentation for contributors (#579)

CONTRIBUTING.md

@@ -47,29 +47,28 @@ You will need some knowledge of git, github, and Python/Django development. Usin
 
 ### Local installation
 
-This section assumes you know about local Python versions and virtual environments.
+This pages uses [uv](https://github.com/astral-sh/uv) and [just](https://github.com/casey/just).
 
-To clone the repository and install the requirements for local development:
+After installing both, check out this repository and type `just bootstrap` to bootstrap a development environment.
 
 ```console
 git clone git://github.com/zostera/django-marina.git
 cd django-marina
-pip install -U pip -r requirements-dev.txt
-pip install -e .
+just bootstrap
 ```
 
 ### Running the tests
 
 To run the tests:
 
 ```console
-make test
+just test
 ```
 
 To run the tests on all supported Python/Django combinations:
 
 ```console
-make tests
+just tests
 ```
 
 ## Pull Request Guidelines

justfile

@@ -37,6 +37,10 @@ default:
     coverage run manage.py test
     coverage report
 
+# Test
+@tests: bootstrap
+    tox
+
 # Build
 @build: bootstrap
     uv build