фикс: зависания соединения с протоколом http

src/server/connection.cpp

@@ -50,9 +50,7 @@ namespace http::server {
 
     void Connection::doWrite() {
         reply_.headers.push_back({.name = "Server", .value = SERVER_HEADER_VALUE});
-        if (!reply_.content.empty()) {
         reply_.headers.push_back({.name = "Content-Length", .value = std::to_string(reply_.content.size())});
-        }
         if (request_.http_version_major == 1) {
             reply_.headers.push_back({.name = "Connection", .value = "keep-alive"});
         }