报错信息：
N: Download is performed unsandboxed as root as file ‘/opt/nginx_1.22.0-1~buster_amd64.deb’ couldn’t be accessed by user ‘_apt’. - pkgAcquire::Run (13: Permission denied)

解决方法：
root@8e5a85884551:/opt# chmod 777 nginx_1.22.0-1~buster_amd64.deb
再次安装即可。