Seed OpenLDAP with bootstrap users including email addresses

Add docker/openldap/bootstrap.ldif which creates an ou=people OU and
three test users (admin, approver, staff) each with a mail attribute,
matching the database seeder. Mount the LDIF into the openldap container
and add --copy-service so it is loaded on first boot.

compose.yaml

@@ -84,6 +84,7 @@ services:
             - sail
     openldap:
         image: 'osixia/openldap:1.5.0'
+        command: '--copy-service'
         ports:
             - '${FORWARD_LDAP_PORT:-389}:389'
             - '${FORWARD_LDAPS_PORT:-636}:636'
@@ -98,6 +99,7 @@ services:
         volumes:
             - 'sail-ldap-data:/var/lib/ldap'
             - 'sail-ldap-config:/etc/ldap/slapd.d'
+            - './docker/openldap/bootstrap.ldif:/container/service/slapd/assets/config/bootstrap/ldif/custom/bootstrap.ldif'
         networks:
             - sail
         healthcheck: