Add comment about final_path

scripts/install

@@ -47,6 +47,9 @@ app=$YNH_APP_INSTANCE_NAME
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
 #=================================================
 
+### In case of an app wich use directly nginx as webserver wich is written in html, php the final path is "/var/www/$app"
+### For the app which has an internal webserver or which use uwsgi wich is written in python, java, go, ...
+### the final path is "/opt/yunohost/$app"
 final_path=/var/www/$app
 test ! -e "$final_path" || ynh_die "This path already contains a folder"