$ composer install
$ php bin/console assets:install
$ cp .env .env.local
$ put your local configuration entries in .env.local
$ bin/console doctrine:database:create
$ bin/console doctrine:schema:update
$ mkdir -p config/jwt
$ openssl genpkey -out config/jwt/private.pem -aes256 -algorithm rsa -pkeyopt rsa_keygen_bits:4096
$ openssl pkey -in config/jwt/private.pem -out config/jwt/public.pem -pubout
$ bin/console symfony:server:start(don't forget to install symfony cli https://symfony.com/download)