Chore: upgrade template to 1.9.1

Dockerfile

@@ -1 +1 @@
-FROM semtech/mu-javascript-template:1.8.0
+FROM semtech/mu-javascript-template:1.9.1

app.js

@@ -1,12 +1,17 @@
-import { app } from 'mu';
-import services from './config/rules';
+import { app, errorHandler, beforeExit, uuid } from 'mu';
 import normalizeQuad from './config/normalize-quad';
 import bodyParser from 'body-parser';
 import dns from 'dns';
 import { foldChangeSets } from './folding';
 import { sendRequest } from './send-request';
 import { sendBundledRequest } from './bundle-requests';
 
+import services from './config/rules.js';
+
+beforeExit( async () => {
+  console.log('Shutting down delta-notifier gracefully...');
+});
+
 // Log server config if requested
 if( process.env["LOG_SERVER_CONFIGURATION"] )
   console.log(JSON.stringify( services ));
@@ -139,3 +144,5 @@ async function getServiceIp(entry) {
     } );
   } );
 };
+
+app.use(errorHandler);

package.json

@@ -3,6 +3,7 @@
   "version": "0.4.0",
   "description": "Sends notifications about changes to interested mu.semte.ch microservices",
   "main": "app.js",
+  "type": "module",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },