Harden bot, storage and web API

index.js

@@ -56,9 +56,36 @@ for (const file of eventFiles) {
   }
 }
 
-client.login(config.token);
-
 const musicQueue = new MusicQueue(client);
-startWebServer({ queue: musicQueue });
+await client.login(config.token);
+
+const { server } = startWebServer({ queue: musicQueue });
+
+server.on("error", (error) => {
+  console.error("HTTP server error", error);
+});
+
+let shuttingDown = false;
+async function shutdown(signal) {
+  if (shuttingDown) return;
+  shuttingDown = true;
+  console.log(`[${new Date().toLocaleString()}] Shutting down (${signal})`);
+
+  musicQueue.shutdown();
+  client.destroy();
+
+  const forceExit = setTimeout(() => process.exit(1), 10_000);
+  forceExit.unref();
+
+  server.close(() => {
+    clearTimeout(forceExit);
+  });
+}
+
+process.once("SIGTERM", () => void shutdown("SIGTERM"));
+process.once("SIGINT", () => void shutdown("SIGINT"));
+process.on("unhandledRejection", (error) => {
+  console.error("Unhandled promise rejection", error);
+});
 
 export { client, musicQueue };