更新到最新版本错误

[balupton (Benjamin Lupton)]

如果您的服务器没有交换空间（您可以通过运行 free 命令在服务器上进行检查），那么您可以添加交换空间而不是升级服务器：

Failed to upgrade discourse instance to Feb 15 2022

You need to add some swap. Looks like you have plenty of disk, so you could add 2G or even 3G for safety. The discourse standard setup should, I think, have already set up the swap for you. Perhaps see Create a swapfile for your Linux server