handle the SIGTERM, now stop the the thread of the game

main.cpp

@@ -1,6 +1,17 @@
 #include "TCPServer.h"
+#include <csignal>
+
+std::atomic<bool> shouldStop = false;
+
+void signalHandler( int signum ) {
+
+    shouldStop = true;
+
+    exit(signum);
+}
 
 int main(int argc, char* argv[]) {
+    signal(SIGINT, signalHandler);
 
     int port = 8080;
     if (argc >= 2) {
@@ -12,8 +23,8 @@ int main(int argc, char* argv[]) {
     try {
         server.start();
 
-        while (!server.shouldStop()) {
-            usleep(1'000'000);
+        while (!server.shouldStop() && !shouldStop) {
+            usleep(500'000);
         }
 
         server.stop();