Add documentation website link

README.md

@@ -59,10 +59,16 @@ In particular, these are the additional dependencies and the packages that bring
 
 ### Build
 
-For the build instruction, you can refer to the documnentation folder:
+For the build instruction, you can refer to the documentation folder:
 
 `documentation/dev/`
 
+or to the web-based render at the documentation website:
+
+https://geomodel.web.cern.ch/geomodel/
+
+
+
 ## License
 
 GeoModel is distributed under the [Apache 2.0 license](LICENSE)