Fixes ynh_die errors

scripts/install

@@ -35,7 +35,7 @@ workdir=$(pwd)
 # Check domain/path availability
 sudo yunohost app checkurl $domain -a $app
 if [[ ! $? -eq 0 ]]; then
-  ynh_die
+  ynh_die "domain not available"
 fi
 
 # Save specific settings
@@ -104,7 +104,7 @@ sudo systemctl enable Rocketchat.service
 isup=false; x=45; while [ $x -gt 0 ];do echo "Waiting approx. $x seconds..."; \
 x=$(( $x - 1 )); sleep 1; if $(curl -m 1 -s localhost:3000/api/v1/info | \
 grep -e "success.*true" >/dev/null 2>%1); then isup=true; break; fi; done && if $isup; \
-then echo "service is up"; else ynh_die; fi
+then echo "service is up"; else ynh_die "$app could not be started"; fi
 
 cd $workdir