nginx-ui/nginx.conf

server {
    listen       80;
    server_name  localhost;  # your domain here
    client_max_body_size 128M;  # maximum upload size
    root	/app/html;
	index	index.html;

	location / {
		# First attempt to serve request as file, then
		# as directory, then fall back to displaying a 404.
                index index.html;
		try_files $uri $uri/ /index.html;
	}

	location /api/ {
		proxy_set_header Host $host;
        proxy_set_header X-Real_IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr:$remote_port;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection upgrade;
		proxy_pass http://127.0.0.1:9100/;
	}
}