compoer exited with code 1

[KirylMi]

Hi there!
I have cloned the project, entered the "docker-compose up" command.
After finishing the process, there is such log:

Creating ineat_php_1 ... done
Creating ineat_composer_1 ... done
Creating ineat_db_1 ... done
Creating ineat_web_1 ... done
Attaching to ineat_php_1, ineat_composer_1, ineat_db_1, ineat_web_1
composer_1 | Composer could not find a composer.json file in /app
composer_1 | To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section
ineat_composer_1 exited with code 1
php_1 | [26-Mar-2020 18:21:02] NOTICE: fpm is running, pid 1
php_1 | [26-Mar-2020 18:21:02] NOTICE: ready to handle connections
db_1 | The files belonging to this database system will be owned by user
and a bit more of logs

So the thing is that composer throws this "could not find a composer.json file" error. Is it okay?
Tried this project on 2 different ubuntu PC's. Same thing on each one of them.

During the preparation there were some red lines with errors like:

• debconf: delaying package configuration, since apt-utils is not installed
• configure: WARNING: unrecognized options: --with-vpx-dir
  etc. B