simply clone the project using
git clone https://github.com/AmirTahani/AskSteve.git
for https and for ssh use
git clone git@github.com:AmirTahani/AskSteve.git
then use yarn or npm install command to install dependencies.
use react-native run-android or npm run android to run android application.
and use react-native run-ios or npm run ios to run ios application.
you can run metro bundler by using npm start command.