First, put your ssl-data to ./conf.d/nginx/ssl/.. or remove lines with ssl from ./conf.d/nginx/conf.d/app.conf. Then you must create and fill .env file:
cp .env.example .env.
For more comfort create few aliases:
alias dc='docker-compose'
alias mng='dc exec app ./manage.py'
So, now you can start your docker-stack, but firstly you must create volume for PostgreSQL:
docker volume create --name=main_postgres
After that execute dc up -d --build - your stack is up. And subsequent commands you should perform for containers.
For app you must run a batch of commands:
mng collectstatic - places static files of packages to your static dir
mng migrate - performs base django migrations
mng makemigrations ; mng migrate - here perform migrations for your models
mng createsuperuser - and create admin
Example contains not so many tests, but all the same:
mng test
And keep in mind security!