我按照离线部署的说明操作，成功加载了 docker 镜像，但在新的 ubuntu 系统上安装 brainframe-cli 之后，无法使用“brainframe compose up -d”。
错误信息是需要设置 BRAINFRAME_INSTALL_PATH。
"It appears that the BrainFrame server has not been installed yet. Have you run “brainframe install”? If you’ve installed to a custom location, ensure that the BRAINFRAME_INSTALL_PATH environment variable has been set.
"
怎样设置这个路径？
谢谢。