mv service_conf.yaml to conf/ and fix: add 'answer' as a parameter to 'generate' (#3379)

### What problem does this PR solve?
#3373

### Type of change

- [x] Refactoring
- [x] Bug fix

docker/docker-compose.yml

@@ -15,7 +15,6 @@ services:
       - 80:80
       - 443:443
     volumes:
-      - ./service_conf.yaml:/ragflow/conf/service_conf.yaml
       - ./ragflow-logs:/ragflow/logs
       - ./nginx/ragflow.conf:/etc/nginx/conf.d/ragflow.conf
       - ./nginx/proxy.conf:/etc/nginx/proxy.conf