Add reference to the page for the IST-4-JAV class (kept outside with the class itself)

index.md

@@ -45,3 +45,7 @@ I have developped and maintain the following tools:
 - [soprano](https://gitlab.huma-num.fr/disco-lge/soprano) : a tool to process
   ALTO files containing the pages of an encyclopedia into a set of
   XML-TEI-encoded articles after fixing the layout.
+
+## Teaching
+
+I teach the [IST-4-JAV](IST-4-JAV.html) class at [INSA-Lyon](https://www.insa-lyon.fr/).