Inject server configuration instead of using a singleton

src/server/server.cpp

@@ -20,13 +20,13 @@ void HttpServer::Execute()
 	}
 }
 	
-HttpServer::HttpServer(Logger & _logger)
+HttpServer::HttpServer(Logger & _logger, ServerConfiguration const & serverConfiguration)
 	: logger(_logger),
-	listeningSocket(ServerConfiguration::GetInstance().GetPort()),
-	connectionOperator(_logger),
+	listeningSocket(serverConfiguration.GetPort()),
+	connectionOperator(_logger, serverConfiguration),
 	isOpen(true)
 {
 	std::stringstream ss;
-	ss << "Listening on port " << ServerConfiguration::GetInstance().GetPort();
+	ss << "Listening on port " << serverConfiguration.GetPort();
 	logger.Info(ss.str());
 }