您好，我尝试按照指南（https://github.com/discourse/discourse/blob/main/docs/INSTALL-cloud.md）在全新安装的 Debian 11 服务器上安装 Discourse Docker 容器，但它以附加的错误消息失败。消息本身没有提供太多关于发生了什么的信息——但它表明访问 GitHub 时存在问题（无法解析 github.com）。服务器本身是一台由 ProxMox/KVM 管理的虚拟机。有人能帮忙解决这个问题吗？
I, [2023-01-10T14:10:50.610422 #1] INFO -- :
> cd /var/www/discourse && git fetch --depth 1 origin tests-passed
fatal: unable to access 'https://github.com/discourse/discourse.git/': Could not resolve host: github.com
...
Pups::ExecError: cd /var/www/discourse && git fetch --depth 1 origin tests-passed failed with return #<Process::Status: pid 141 exit 128>
Location of failure: /usr/local/lib/ruby/gems/3.1.0/gems/pups-1.1.1/lib/pups/exec_command.rb:117:in `spawn'
exec failed with the params {"cd"=>"$home", "hook"=>"code", "cmd"=>["git reset --hard", "git clean -f", "git remote set-branches --add origin main", "git remote set-branches origin $version", "git fetch --depth 1 origin $version", "git checkout $version", "mkdir -p tmp", "chown discourse:www-data tmp", "mkdir -p tmp/pids", "mkdir -p tmp/sockets", "touch tmp/.gitkeep", "mkdir -p /shared/log/rails", "bash -c \"touch -a /shared/log/rails/{production,production_errors,unicorn.stdout,unicorn.stderr,sidekiq}.log\"", "bash -c \"ln -s /shared/log/rails/{production,production_errors,unicorn.stdout,unicorn.stderr,sidekiq}.log $home/log\"", "bash -c \"mkdir -p /shared/{uploads,backups}\"", "bash -c \"ln -s /shared/{uploads,backups} $home/public\"", "bash -c \"mkdir -p /shared/tmp/{backups,restores}\"", "bash -c \"ln -s /shared/tmp/{backups,restores} $home/tmp\"", "chown -R discourse:www-data /shared/log/rails /shared/uploads /shared/backups /shared/tmp", "[ ! -d public/plugins ] || find public/plugins/ -maxdepth 1 -xtype l -delete"] }
bootstrap failed with exit code 128
