我想在 docker-compose 启动容器前先执行一个 shell 命令，该怎么写?

version: '3'
services:
  openresty:
    image: openresty/openresty:latest
    container_name: openresty
    volumes:
      - ./nginx/nginx.conf:/usr/local/openresty/nginx/conf/nginx.conf
      - ./nginx/lua:/lua
    ports:
      - 8080:80
      - 8443:443
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
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