chore(docker): remove container_name and network, add healthcheck

- Remove explicit container_name to allow Docker Compose to generate unique names
- Remove custom network configuration as default network is sufficient
- Add curl installation and healthcheck to Dockerfile for better container monitoring

docker-compose.yml

@@ -4,7 +4,6 @@ services:
   calorie-tracker:
     build: ./calorie_tracker_app
     image: git.jpaleviado.site/kingjaypee12/calorie-tracker:latest
-    container_name: calorie-tracker
     restart: unless-stopped
     ports:
       - "5001:5000"
@@ -15,9 +14,3 @@ services:
       - SECRET_KEY=change-this-secret-key-in-production
       - API_NINJAS_KEY=${API_NINJAS_KEY}
       - PORT=5000
-    networks:
-      - casaos-net
-
-networks:
-  casaos-net:
-    driver: bridge