太极堂 BBS 搭建备忘
安装在最便宜的阿里云主机上，系统为 Ubuntu 16.04，内存需要启用 Swap 空间。
Port 80 appears to already be in use.
If you are trying to run Discourse simultaneously with another web
server like Apache or nginx, you will need to bind to a different port
If you are reconfiguring an already-configured Discourse, use
./launcher stop app