diff --git a/README.md b/README.md
index f31d7fb..cdefd84 100644
--- a/README.md
+++ b/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
+
+
+
+Added images must have a 3:2 aspect ratio.
+For the moment, the dimensions and sizes accepted are those shown in the image below.
+The recommended format is medium.
## Get in touch
Send an email at , [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.
diff --git a/assets/dimensions_and_weight.png b/assets/dimensions_and_weight.png
new file mode 100644
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Binary files /dev/null and b/assets/dimensions_and_weight.png differ
diff --git a/assets/dimensions_and_weight.png.license b/assets/dimensions_and_weight.png.license
new file mode 100644
index 0000000..85678ba
--- /dev/null
+++ b/assets/dimensions_and_weight.png.license
@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: Copyright © 2022 The OSRD Contributors
+#
+# SPDX-License-Identifier: LGPL-3.0-only