修复 WebSocket 400 错误

api.conf

@@ -72,5 +72,7 @@ location = /http {
 # WebSocket Proxy
 location = /ws {
   access_by_lua_file    ../lua/ws-dec-req-hdr.lua;
+  proxy_set_header      Upgrade     $http_upgrade;
+  proxy_set_header      Connection  $http_connection;
   proxy_pass            $_url;
 }