fix: match container ports to host ports

docker-compose.yml

@@ -5,13 +5,14 @@ services:
       dockerfile: Dockerfile
     environment:
       NODE_ENV: production
+      PORT: ${PORT:-3000}
       NEXT_PUBLIC_SITE_URL: ${NEXT_PUBLIC_SITE_URL:-http://localhost:3000}
       DATABASE_URL: ${DATABASE_URL:-postgresql://postgres:postgres@db:5432/holiday_property_booking?schema=public}
     depends_on:
       db:
         condition: service_healthy
     ports:
-      - "${WEB_PORT:-3000}:3000"
+      - "${PORT:-3000}:${PORT:-3000}"
 
   db:
     image: postgres:16-alpine
@@ -26,4 +27,3 @@ services:
       interval: 5s
       timeout: 5s
       retries: 10
-