ERROR: Could not open requirements file: [Errno 2] No such file or directory: '/app/requirements.txt'

[cacosen]

我在centos7中安装的，在执行docker-compose up -d后，报错：
WARNING: You are using pip version 19.3.1; however, version 20.3.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
ERROR: Service 't2backend' failed to build: The command '/bin/sh -c pip install --no-cache-dir -r /app/requirements.txt' returned a non-zero code: 2

[root@VM-128-10-centos JudgeServer]# pip install --no-cache-dir -r /app/requirements.txt
ERROR: Could not open requirements file: [Errno 2] No such file or directory: '/app/requirements.txt'