Added a function to stop the healthchecks timer

server/tasks/healthchecks.js

@@ -51,4 +51,12 @@ module.exports.sendRunning = async () => {
 // Starts a timer which sends a ping every minute
 module.exports.startTimer = () => {
     job = schedule.scheduleJob('* * * * *', () => this.sendCurrent());
+}
+
+// Stops the timer
+module.exports.stopTimer = () => {
+    if (job !== undefined) {
+        job.cancel();
+        job = undefined;
+    }
 }