Async/await let's go!

bin/genieacs-nbi

@@ -27,7 +27,7 @@ function exitWorkerGracefully(): void {
 }
 
 function exitWorkerUngracefully(): void {
-  extensions.killAll(() => {
+  extensions.killAll().then(() => {
     process.exit(1);
   });
 }
@@ -97,11 +97,13 @@ if (!cluster.worker) {
       .catch(exitWorkerUngracefully);
   });
 
-  db.connect(err => {
-    if (err) throw err;
-    cache.connect(err => {
-      if (err) throw err;
+  Promise.all([db.connect(), cache.connect()])
+    .then(() => {
       server.start(SERVICE_PORT, SERVICE_ADDRESS, ssl, listener);
+    })
+    .catch(err => {
+      setTimeout(() => {
+        throw err;
+      });
     });
-  });
 }