fix(ragflow): correct nginx config and backend port (#41)

mount nginx config to conf.d/default.conf instead of
sites-available/default, and set SVR_HTTP_PORT to 9380
(official default) instead of 80 which conflicts with
nginx and causes 502 on api requests

docker-compose.yml

@@ -1030,10 +1030,10 @@ services:
       REDIS_HOST: ragflow-redis
       REDIS_PASSWORD: ${RAGFLOW_REDIS_PASSWORD}
       REDIS_PORT: 6379
-      SVR_HTTP_PORT: 80
+      SVR_HTTP_PORT: 9380
     volumes:
       - ragflow_data:/ragflow
-      - ./ragflow/nginx.conf:/etc/nginx/sites-available/default:ro
+      - ./ragflow/nginx.conf:/etc/nginx/conf.d/default.conf:ro
     depends_on:
       ragflow-elasticsearch:
         condition: service_healthy