Add spawner form illustration

README.md

@@ -1,8 +1,23 @@
 JupyterHub Batch Spawner for GLiCID
 ===================================
 
-Setup
+![Spawner form](img/spawner_form.png)
------
+
+
+JupyterHub config
+-----------------
+
+In `jupyterhub_config.py`, add:
+```txt
+c.JupyterHub.spawner_class = 'glicid-spawner'
+```
+
+At the moment, you also need to change the `c.GlicidSpawner.batch_script`.
+This will be be included in the future.
+
+
+Contribution
+------------
 This package is managed by [Poetry](https://python-poetry.org/):
 ```bash
 git clone https://gitlab.univ-nantes.fr/glicid/jupyter/spawner glicid-spawner
@@ -32,18 +47,6 @@ To activate the virtual environement globally:
 source .venv/bin/activate
 ```
 
-JupyterHub config
------------------
-
-In `jupyterhub_config.py`, add:
-```txt
-c.JupyterHub.spawner_class = 'glicid-spawner'
-```
-
-At the moment, you also need to change the `c.GlicidSpawner.batch_script`.
-This will be be included in the future.
-
-
 External resources
 ------------------
 - https://jupyterhub.readthedocs.io/en/stable/reference/spawners.html