You can open the SCM/Kudu site by replacing $APP_NAME with your app service name, which is the name you used in the az webapp create command. Kudu is the App Service companion app for diagnostics, deployment, troubleshooting, and file management.
echo "Kudu URL: https://$APP_NAME.scm.azurewebsites.net"
Kudu URL: https://<app-name>.scm.azurewebsites.net