It is not important to be updated regularly (via CRON), but rather that it is published with the last update date information.
I believe it is not a good idea to add this information to the file header, as it could potentially disrupt applications that download the file. On the other hand, if you add it to the website (), the information may be lost. The best approach in this situation would be to include the last update date information on the page . The date format can be adjusted based on your preferences.
