README: improve README (#11)

README.md

@@ -34,9 +34,35 @@ Check out: [OSRD primary repository](https://github.com/OpenRailAssociation/osrd
 Build osrd-images with an example infrastructure:
 
 ```sh
-# TODO
+docker build -t osrd-images .
 ```
 
+Run osrd-images on port 8080
+
+```sh
+docker run -p -d 8080:80 osrd-images
+```
+
+Test the server response and check that the schema of the json file `image_path.json` matches the structure of the src folder 
+
+```sh
+curl https://localhost:8080/image_path.json
+```
+
+## Add a new category of images
+
+To add new image categories, you must :
+- Add a new folder named after the category in the ```/src``` folder.
+- Add an image representing the category (```category.png``` or ```category.jpeg``` or category.jpg) with its ```.license``` file in the ```/src``` folder.
+- Add the images in each category with their ```.license``` files
+
+### Requirements
+
+ <img src="assets/dimensions_and_weight.png" alt="Dimensions and weightt"/>
+
+Added images must have a 3:2 aspect ratio. 
+For the moment, the dimensions and sizes accepted are those shown in the image below. <br>
+The recommended format is <strong> medium</strong>. 
 ## Get in touch
 
 Send an email at <[email protected]>, [open an issue](https://github.com/OpenRailAssociation/osrd/issues/new?labels=kind%3Aquestion&template=question.yaml), or join the [#public-general:osrd.fr](https://matrix.to/#/#public-general:osrd.fr) matrix channel.

assets/dimensions_and_weight.png.license

@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: Copyright © 2022 The OSRD Contributors
+#
+# SPDX-License-Identifier: LGPL-3.0-only