First, you need to install docker, we recommand to install 'Docker Desktop' application. Also, you need to install git, we recommand to install 'GitHub Desktop' application.
Clone repository in your odoo development folder (exemple user/odoo):
mkdir odoo && cd odoo
git clone git@github.com:adgensee/odoo-docker.git --depth 1 --branch 15.0 odoo15
./bin/dependencies-download.sh
docker-compose -f docker-compose-odoo15_dev.yml up -d
docker ps
docker stop odoo15-dev-web-1
docker stop odoo15-dev-db-1
http://localhost:8015
Master Password : ######
Database : odoo15_dev
Admin email : admin
Admin password : admin