Disable proxy buffering (#2017)

Author: frenck

node-red/rootfs/etc/nginx/includes/proxy_params.conf

@@ -4,6 +4,7 @@ proxy_read_timeout          86400s;
 proxy_redirect              off;
 proxy_send_timeout          86400s;
 proxy_max_temp_file_size    0;
+proxy_buffering             off;
 
 proxy_set_header Accept-Encoding "";
 proxy_set_header Connection $connection_upgrade;