[Etherpad] Change backup frequency to every 24 hours, at 1am

pica-db-backup/config/backup_config.json

@@ -18,9 +18,9 @@
     "Database": "--all-databases",
     "Type": "mysql",
     "Folder": "etherpad",
-    "Cron": "0 */12 * * *",
+    "Cron": "0 1 * * *",
     "Options": "--single-transaction",
-    "Init-Backup": "1"
+    "Init-Backup": "0"
   },
   "wekan": {
     "Host": "wekan-db",