run system checks immediately post activation

this will notify about backup configuration

src/cloudron.js

@@ -18,7 +18,7 @@ exports = module.exports = {
     setDashboardDomain: setDashboardDomain,
     renewCerts: renewCerts,
 
-    systemChecks: systemChecks,
+    runSystemChecks: runSystemChecks,
 
     // exposed for testing
     _checkDiskSpace: checkDiskSpace
@@ -188,12 +188,12 @@ function isRebootRequired(callback) {
 }
 
 // called from cron.js
-function systemChecks() {
+function runSystemChecks() {
     async.parallel([
         checkBackupConfiguration,
         checkDiskSpace
     ], function () {
-        debug('systemChecks: done');
+        debug('runSystemChecks: done');
     });
 }
 

src/cron.js

@@ -118,8 +118,9 @@ function recreateJobs(tz) {
     if (gJobs.systemChecks) gJobs.systemChecks.stop();
     gJobs.systemChecks = new CronJob({
         cronTime: '00 30 * * * *', // every hour
-        onTick: cloudron.systemChecks,
+        onTick: cloudron.runSystemChecks,
         start: true,
+        runOnInit: true, // run system check immediately
         timeZone: tz
     });