Update app.py

app.py

@@ -46,7 +46,14 @@ Carefully examine the full trailer image and locate these 4 components:
 1. SENSORS    — Exactly TWO silver/beige DIAMOND (rhombus/rotated-square) shaped metal plates.
                 They are mounted near the lower-rear area on the back doors of the trailer.
 2. GPS_DEVICE — A small white or light-gray rectangular electronic box mounted at the upper
-                corner of the trailer rear face. About the size of a paperback book. At upper top corner (right or left) of trailer rear face.
+                corner of the trailer rear face. About the size of a paperback book. 
+                - GPS_DEVICE — A small white or light-gray rectangular electronic box mounted at the upper corner
+                A tracking device mounted on the upper rear area of the trailer.
+                + It may:
+                +   - be white, gray, or black
+                +   - include cables, mounts, or connectors
+                +   - appear inside a recessed panel or metal frame
+                +   - not be a perfect rectangle
 3. PRIME_LOGO — The Amazon Prime branding logo: the word "prime" OR "amazon" OR the Amazon arrow/smile logo
                 OR both. Can be full or partially visible, on rear or side of trailer. Find it carefully. It can be partial, small/tiny, large etc.
 4. TRAILER_ID — A vertical fluorescent-green or yellow-green label strip on the corner post/pillar,