docs: improve example with PM2

Author: darrachequesne

examples/pm2-example/entrypoint.js

@@ -36,3 +36,10 @@ io.on("connection", (socket) => {
     console.log(`disconnect ${socket.id} due to ${reason}`);
   });
 });
+
+// graceful shutdown
+process.on("SIGINT", () => {
+  io.close((err) => {
+    process.exit(err ? 1 : 0);
+  });
+});

examples/pm2-example/fastify-entrypoint.js

@@ -40,10 +40,13 @@ fastify.addHook("preClose", (done) => {
   done();
 });
 
-fastify.addHook("onClose", (_instance, done) => {
-  io.close(done);
-});
-
 fastify.ready(() => {
   console.log("successfully booted!");
 });
+
+// graceful shutdown
+process.on("SIGINT", () => {
+  fastify.close((err) => {
+    process.exit(err ? 1 : 0);
+  });
+});