fix the nginx conf file

etc/nginx/conf.d/cs4430.conf

@@ -3,7 +3,7 @@ server {
     listen [::]:80;
 
     root /var/www/;
-    landingPage landingPage.html
+    landingPage.html
     server_name _;
 
     access_log /var/log/nginx/access.log;