Added cron flag to script.

README.md

@@ -2,3 +2,9 @@
 
 This is the program that runs every day at 12:00 AM UTC and backs up the non-volatile user data from [Flashii](https://flashii.net).
 Provided for transparency.
+
+## Grant line for MySQL backup user
+
+```
+GRANT SELECT, LOCK TABLES, SHOW VIEW, EVENT, TRIGGER, EXECUTE  ON *.* TO 'user'@'localhost';
+```

do-backup.sh

@@ -1,3 +1,3 @@
 export DOTNET_CLI_TELEMETRY_OPTOUT=1
 
-dotnet run --project BackupManager -c Release -f netcoreapp2.2
+dotnet run --project BackupManager -c Release -f netcoreapp2.2 -- -cron