DATABASE_URL=postgres://onlinejudge:onlinejudge@localhost:5433/onlinejudge
REDIS_URL=redis://localhost:6380
JUDGE_SERVER_URL=http://localhost:8081
# 判题机 token：自己生成，不要用固定值。
#   TOKEN=$(openssl rand -hex 32)
#   echo "JUDGE_SERVER_TOKEN=$TOKEN" >> .env          # 后端读这里
#   echo "OJ2_JUDGE_TOKEN=$TOKEN"    >> docker/.env   # 判题机容器读这里，两边必须一致
# 留空的话后端会随机生成一个并在启动日志里告警，判题机心跳会被 403 挡掉。
JUDGE_SERVER_TOKEN=
JUDGE_CONCURRENCY=2
OJ2_DEV_USERNAME=student
OJ2_DEV_PASSWORD=student123