updated install script with cron jobs

Cron/autoBackup.sh

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+# cron-timing: 05 01  *   *   1
+container_name="arbeitszeitmessung-main-db-1"
+filename=backup-$(date '+%d%m%Y').sql
+database_name=__DATABASE__
+docker exec $container_name pg_dump $database_name > /home/pi/arbeitszeitmessung-backup/$filename
+echo "created backup file: "$filename

Cron/autoHolidays.sh

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+# Calls endpoint to write all public Holidays for the current year inside a database.
+port=__PORT__
+curl localhost:$port/auto/feiertage

Cron/autoLogout.sh

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+# cron-timing: 55 23  *   *   *
+# Calls endpoint to log out all users, still logged in for today
+port=__PORT__
+curl localhost:$port/auto/logout