Resolve "Ajout de la doc des routes API"

content/docs/backendapi/introduction.md

@@ -18,6 +18,8 @@ top = false
 
 In this section we will summarize briefly the the API description and how to add routes.
 
+The Dojo routes API documentation (and its [OpenAPI specification](https://rdps.hesge.ch/dojo/api/docs/OpenAPI.yaml)) can be found [in swagger](https://rdps.hesge.ch/dojo/api/docs/swagger/) or [in redoc](https://rdps.hesge.ch/dojo/api/docs/redoc.html) format.
+
 ## Development / Contribution
 
 * How to contribute - Available soon