LDAP port not exposed

[esackbauer]

I am using only LDAP in my authproxy.cfg:
`
[ad_client]
host=10.0.0.1 ; IP address of the Active Directory domain controller
service_account_username=ldap
service_account_password=xxxxxxxx
search_dn=DC=xxxxxx,DC=org
; security_group_dn=CN=DuoVPNUsers,OU=Groups,DC=example,DC=com
; transport=starttls
; ssl_ca_certs_file=conf\example_com_ca.pem

; Application Matrix
[ldap_server_auto]
ikey=xxxxx
skey=yyyyyyyyyyyyyyyyyyyyyyy
api_host=api-4xxxxxx1f.duosecurity.com
factors=auto
client=ad_client
failmode=secure
port=1389
;ssl_key_path=server.key
;ssl_cert_path=server.crt
exempt_primary_bind=false
`
I cannot assign a port publishing. However contacting it under the docker IP 172.17.x.x on port 1389 is working.
When I try to publish it in the Container config in Portainer it says "a.ExposedPorts is undefined" and from what I see the container config has an empty "Port:" section.