Add dev dependencies: linters, formatters, testing

README.md

@@ -7,9 +7,30 @@ The Servala Self-Service Portal
 Use ``uv`` to install the project and run its commands while you’re developing:
 
 ```bash
-uv sync
+uv sync --dev
 uv run src/manage.py migrate
 uv run src/manage.py runserver
 ```
 
 This will start the development server on http://localhost:8000.
+
+### Configuration
+
+TODO
+
+### Code style and linting
+
+Servala uses several linters / formatters to keep the project style consistent for you.
+Run them like this:
+
+```bash
+uv run black src/  # Code formatting; -c to just check
+uv run isort src/  # Import ordering; -c to just check
+uv run djlint src/ --reformat --format-js --format-css  # Format templates, JS and CSS, --check to just check
+uv run flake8 src/  # Python linter
+```
+
+
+### Testing
+
+TODO