fix security headers and sockets

Signed-off-by: Zoey <zoey@z0ey.de>

rootfs/usr/local/nginx/conf/nginx.conf

@@ -23,7 +23,11 @@ http {
     lua_package_path "/usr/local/nginx/lib/lua/?.lua;;";
 
     server_tokens off;
-    hide_server_tokens on;
+    more_clear_headers "Server";
+    more_clear_headers "X-Powered-By";
+    more_clear_headers "X-Page-Speed";
+    more_clear_headers "X-Varnish";
+
     aio threads;
     sendfile on;
     tcp_nopush on;