Fix(domserver): docker compose mount point

roles/configure_domserver/templates/docker-compose.yml.jinja

@@ -21,11 +21,11 @@ services:
       CONTAINER_TIMEZONE: Asia/Taipei
     restart: always
     volumes:
-      - "restapi_secret:/opt/domjudge/domserver/etc/restapi.secret"
+      - "domserver_etc:/opt/domjudge/domserver/etc/"
       - "./config/php/domjudge.conf:/etc/php/8.2/fpm/pool.d/domjudge.conf"
     depends_on:
       - mariadb
     ports: 
       - "127.0.0.1:8080:80"
 volumes:
-  restapi_secret: {}
+  domserver_etc: {}