In your terminal in the root of the directory:
cd ~/Documents/6_CODE/kurt-duran-yalcin/
dev_appserver.py app.yaml
App will be running at localhost:8080.
In your terminal in the root of the directory:
open new tab in terminal
cd ~/Documents/6_CODE/kurt-duran-yalcin/
gcloud app deploy
troubleshoot = ctrl + C