Rename container from location-tracker-app to location-tracker

Simplified container naming for consistency.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker-compose.yml

@@ -2,7 +2,7 @@ services:
   # Location Tracker App (Next.js)
   app:
     build: .
-    container_name: location-tracker-app
+    container_name: location-tracker
     env_file:
       - .env
     ports: