nginx in front of ape

upstream app_servers {
	server 127.0.0.1:6969;
}

server {
	listen 80;
	server_name my_names;
	resolver 127.0.0.1;
	resolver_timeout 2s;
	keepalive_timeout 1800;
	location / {
		error_page 405 = @app;
		try_files $uri @app;
	}

	location @app {
		keepalive_timeout 1800;
		#keepalive_timeout 0;
		proxy_buffering off;
		#proxy_set_header Proxy-Connection "";
		proxy_set_header X-Real-IP $remote_addr;
		proxy_read_timeout 30m;
		proxy_send_timeout 30m;
		proxy_pass http://app_servers;
	}
}