WeKan provides quite sophisticated LDAP authentication.

Their wiki page is here.

Their Docker Compose file with all possible LDAP configuration values and their explanation is here.

Docker Sample Settings

Here is a working example for an LDAP configuration via Docker Compose Environment variables:

environment:
  # Other values for your WeKan installation
  - ...
  # LDAP Section
  - DEFAULT_AUTHENTICATION_METHOD=ldap
  - LDAP_ENABLE=true
  - LDAP_PORT=389
  - LDAP_HOST=localhost
  - LDAP_USER_AUTHENTICATION=true
  - LDAP_USER_AUTHENTICATION_FIELD=uid
  - LDAP_BASEDN=ou=people,dc=example,dc=com
  - LDAP_RECONNECT=true
  - LDAP_AUTHENTIFICATION=true
  - LDAP_AUTHENTIFICATION_USERDN=uid=admin,ou=people,dc=example,dc=com
  - LDAP_AUTHENTIFICATION_PASSWORD=replacewithyoursecret
  - LDAP_LOG_ENABLED=true
  # If using LDAPS: LDAP_ENCRYPTION=ssl
  - LDAP_ENCRYPTION=false
  # The certification for the LDAPS server. Certificate needs to be included in this docker-compose.yml file.
  #- LDAP_CA_CERT=-----BEGIN CERTIFICATE-----MIIE+G2FIdAgIC...-----END CERTIFICATE-----
  # Use this if you want to limit to a specific group
  - LDAP_USER_SEARCH_FILTER=(&(objectClass=person)(memberof=cn=wekan_users,ou=groups,dc=example,dc=com))
  - LDAP_USER_SEARCH_SCOPE=one
  - LDAP_USER_SEARCH_FIELD=uid
  - LDAP_USERNAME_FIELD=uid
  - LDAP_FULLNAME_FIELD=cn
  - LDAP_EMAIL_FIELD=mail