What could be causing this supervisord error?

Question

Nginx

I'm trying to run this assembly through docker-compose.
When I start it, I get this log and that's it:

docker-compose up
Starting example_php-server_1
Attaching to example_php-server_1
php-server_1  | /usr/lib/python2.7/dist-packages/supervisor/options.py:297: UserWarning: Supervisord is running as root and it is searching for its configuration file in default locations (including its current working directory); you probably want to specify a "-c" argument specifying an absolute path to a configuration file for improved security.
php-server_1  |   'Supervisord is running as root and it is searching '
php-server_1  | 2017-05-11 18:50:01,689 CRIT Set uid to user 0
php-server_1  | 2017-05-11 18:50:01,690 WARN No file matches via include "/etc/supervisor/conf.d/*.conf"
php-server_1  | 2017-05-11 18:50:01,718 INFO RPC interface 'supervisor' initialized
php-server_1  | 2017-05-11 18:50:01,719 CRIT Server 'unix_http_server' running without any HTTP authentication checking
php-server_1  | 2017-05-11 18:50:01,720 INFO supervisord started with pid 1
php-server_1  | 2017-05-11 18:50:02,725 INFO spawned: 'cron' with pid 7
php-server_1  | 2017-05-11 18:50:02,735 INFO spawned: 'nginx' with pid 8
php-server_1  | 2017-05-11 18:50:02,764 INFO spawned: 'php-fpm7.0' with pid 9
php-server_1  | 2017-05-11 18:50:03,950 INFO success: cron entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
php-server_1  | 2017-05-11 18:50:03,951 INFO success: nginx entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
php-server_1  | 2017-05-11 18:50:03,952 INFO success: php-fpm7.0 entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)

The system is clean. Everything is set up for the first time. Now I'm just learning to work with docker and everything that follows. Proceeding from googling - environment variables do not match. But I did not find a solution how to configure everything. And I have little knowledge in administration. Tell me how to solve?
Thank you in advance