chore: project - 🧹 update .gitignore for app config backup
chore: project - 🧹 update .gitignore for app config backup

Signed-off-by: Pierre-Yves Lapersonne <34c6fceca75e456f25e7e99531e2425c6c1de443@pylapersonne.info>

erikmartens/NearbyWeather,erikmartens/NearbyWeather,erikmartens/NearbyWeather,erikmartens/NearbyWeather