Make node cleanup respect async functions

Author: Matija Petrunic

src/App.ts

@@ -51,8 +51,9 @@ export class App {
     });
   }
 
-  public async stop(): Promise<void> {
+  public async stop(signal: string): Promise<void> {
     await this.instance.close();
+    process.kill(process.pid, signal);
   }
 
   private registerPlugins(): void {
@@ -88,4 +89,4 @@ declare module "fastify" {
     config: Config;
     db: Connection;
   }
-}
+}

src/index.ts

@@ -3,8 +3,10 @@ import nodeCleanup from "node-cleanup";
 
 const app = new App();
 
-nodeCleanup(function () {
-  app.stop();
+nodeCleanup(function (exitCode, signal) {
+  app.stop(signal as string);
+  nodeCleanup.uninstall();
+  return false;
 });
 
-app.start();
+app.start();