prepopulate from ldif still looking for slapd.conf

[strachg]

Firstly, thank you for your work :)

I had this working and I didn't think anything had changed but now I received an error while the container is starting.

Info: Container already configured, therefore ignoring SLAPD_xxx environment variables and preseed files
5b70bf00 @(#) $OpenLDAP: slapd (Aug 10 2017 19:12:46) $
Debian OpenLDAP Maintainers pkg-openldap-devel@lists.alioth.debian.org
5b70bf00 could not stat config file "/etc/ldap/slapd.conf": Permission denied (13)

I used a LDIF file to populate the database which looks to have created the slapd.d folder structure but I started receiving this error. The file doesn't appear to exist but I gather this is correct because it should be using the slapd.d config instead.

Any assistance you can provide would be appreciated. I'm sure I'm just missing some small but important detail.