Install additional php module after deployment

[BeetleJooce]

I failed to notice that php-ldap was not included in the build scripts prior to deployment. I certainly noticed after I migrated an existing site and got the notice.

How can I update the vmss to install the php-ldap module? Any pointers would be appreciated.

Deployed using the "small to midsize" template (modified to use 18.04 as the base).

Thanks!

[UmakanthOS]

Would love to accept any PRs around supporting php-ldap module as part of the template.