Increase keepalive_timeout=300 to prevent /graphs websocket timeout

nginx.conf

@@ -12,7 +12,7 @@ http {
 	sendfile on;
 	tcp_nopush on;
 	tcp_nodelay on;
-	keepalive_timeout 65;
+	keepalive_timeout 300s;
 	types_hash_max_size 2048;
 
 	include /etc/nginx/mime.types;