update readme a bit

README.md

@@ -1,5 +1,6 @@
 Gonna use the intern to build this temp sensing thing.
 
+```
 ble-scanner/
 ├─ app.py                 # Flask + Scheduler + API
 ├─ ble.py                 # BLE helper functions to read temp+humidity data
@@ -10,4 +11,4 @@ ble-scanner/
 ├─ scanner.py             # Handles scanning for Mii sensors, other helper functions
 ├─ sensors.py             # Object classifier
 └─ README.md
-
+```