Update doc to mentions development setup

README.md

@@ -2,16 +2,44 @@
 
 ## Documentation
 
-For more details about this package, make sure to see the documentation available at https://teklia.gitlab.io/atr/dan/.
-
-## Installation
-
 To use DAN in your own scripts, install it using pip:
 
 ```console
 pip install -e .
 ```
 
+For more details about this package, make sure to see the documentation available at https://teklia.gitlab.io/atr/dan/.
+
+## Development
+For development and tests purpose it may be useful to install the project as a editable package with pip.
+
+* Use a virtualenv (e.g. with virtualenvwrapper `mkvirtualenv -a . dan`)
+* Install `dan` as a package (e.g. `pip install -e .`)
+
+### Linter
+Code syntax is analyzed before submitting the code.\
+To run the linter tools suite you may use pre-commit.
+```shell
+pip install pre-commit
+pre-commit run -a
+```
+
+### Run tests
+Tests are executed with `tox` using [pytest](https://pytest.org).
+To install `tox`,
+```shell
+pip install tox
+tox
+```
+
+To reload the test virtual environment you can use `tox -r`
+
+Run a single test module: `tox -- <test_path>`
+Run a single test: `tox -- <test_path>::<test_function>`
+
+The tests use a large file stored via [Git-LFS](https://docs.gitlab.com/ee/topics/git/lfs/). Make sure to run `git-lfs pull` before running them.
+
+
 ## Inference
 
 To apply DAN to an image, one needs to first add a few imports and to load an image. Note that the image should be in RGB.