http://your-ip:10100 : Bad Request (400)

I installed psono-database and psono-server through Docker containers on the same host.
psono-database seems ok (I can connect through psql) and manage.py migrate succeded with all OK flags.

When running psono-server container, the status seems to hang on starting state
Up 3 minutes (health: starting)

In logs the healtcheck seems to fail with 400 Error
[pid: 23|app: 0|req: 2/2] 127.0.0.1 () {24 vars in 271 bytes} [Thu Aug 9 08:19:43 2018] GET /healthcheck/ => generated 26 bytes in 19 msecs (HTTP/1.1 400) 1 headers in 53 bytes (1 switches on core 0)

The same happens calling the ip:10100 port from outside the container (browser or cli) or the localhost:80 from inside the container

[root@red-psono installation-sources]# docker exec -ti psono-server sh
~ # curl localhost:80

[pid: 23|app: 0|req: 1/1] 127.0.0.1 () {24 vars in 247 bytes} [Thu Aug 9 08:18:17 2018] GET / => generated 26 bytes in 144 msecs (HTTP/1.1 400) 1 headers in 53 bytes (1 switches on core 0)

After a while container status become Up 8 minutes (unhealthy).
I expected to see {"detail":"Authentication credentials were not provided."} as writtten in the doc, am I missing something?
Thanks