docs: README, app.json

README.md

+# BabyComeBack | An app to watch your baby for you
+
+## Setup
+- [Activer l'API SMS de Free](https://www.freenews.fr/freenews-edition-nationale-299/free-mobile-170/nouvelle-option-notifications-par-sms-chez-free-mobile-14817)
+- Exporter les identifiants:
+```bash
+export FREE_USER="xxx"
+export FREE_PASS="xxx"
+```
+- Lancer le script:
+```bash
+python baby.py
+```
\ No newline at end of file

app.json

+{
+  "name": "BabyComeBack",
+  "description": "An app to watch your baby for you",
+  "repository": "https://git.plnech.fr/PLN/BabyComeBack",
+  "logo": "https://git.plnech.fr/pln/BabyComeBack/raw/master/baby.jpg",
+  "keywords": ["python", "shopping", "plants"]
+}