nginx permission root

	server{
	listen 4002;
	server_name localhost;
	access_log logs/access.log;
	location / {
	   proxy_set_header X-Real-IP $remote_addr;
	   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	   proxy_set_header Host $http_host;
	   proxy_set_header X-NginxX-Proxy true;
	   proxy_pass http://backend;
	   proxy_redirect off;	   
	   proxy_http_version 1.1;
	   proxy_set_header Upgrade $http_upgrade;
	   proxy_set_header Connection "upgrade";
	   }
	   }
	 upstream backend {
	 server 127.0.0.1:3201;
	 }

location  /map/ {
  alias  /home/user/public_html/map/;
}   Also check what user nginx is running as and make sure that this user can access /home/user/public_html/map