add disk usage task

src/cloudron.js

@@ -19,6 +19,8 @@ exports = module.exports = {
     renewCerts,
     syncDnsRecords,
 
+    updateDiskUsage,
+
     runSystemChecks
 };
 
@@ -344,3 +346,9 @@ async function syncDnsRecords(options) {
     tasks.startTask(taskId, {});
     return taskId;
 }
+
+async function updateDiskUsage() {
+    const taskId = await tasks.add(tasks.TASK_UPDATE_DISK_USAGE, []);
+    tasks.startTask(taskId, {});
+    return taskId;
+}