---
version: "3.9"

services:
  client:
    image: local/c2games-client:latest
    build:
      context: ./client
    environment:
      TEAM_NUM: 5
      SSHD_CHALLENGE_DIR: .ssh/auth_keys

  controller:
    image: local/c2games-controller:latest
    build:
      context: ./controller
    environment:
      TEAM_NUM: 5
    volumes:
      - "${PWD}/keys:/root/.ssh"
...