Use git clone to clone the current repository to your computer.
You can also use Github's desktop application.
Get Composer from their official website and follow their instructions to install on your computer.
In the project folder, open a terminal and run composer install to automatically install
all the dependencies of the project
If not already done with composer install, opy the app/config/parameters.yml.dist
in a new file app/config/parameters.yml indicating the credentials of your computer's installation where needed.
Run php bin/console doctrine:migrations:migrate to be sure that you have the latest migrations on your computer
To run the project on your computer, you can simply run php bin/console server:run or configure a virtual machine
if you know how to.