chore(job_crawler): update docker-compose to use pre-built image

- Replace inline Dockerfile build configuration with pre-built image reference
- Change app service to use `job-crawler:latest` image instead of building from context
- Simplifies docker-compose configuration and enables faster container startup
- Assumes image is built separately via deploy script with no-cache flag

job_crawler/docker-compose.yml

@@ -47,9 +47,7 @@ services:
       - job-network
 
   app:
-    build:
-      context: .
-      dockerfile: Dockerfile
+    image: job-crawler:latest
     container_name: job-crawler
     ports:
       - "8000:8000"