I followed the instructions from the VSC website, and all three methods failed:
1) [sudo] [dpkg] [-i] code_1.63.2-1639562499_amd64.deb
dpkg: error: cannot access archive 'code_1.63.2-1639562499_amd64.deb': No such file or directory
2) [sudo] [apt-get] [install] [-f] code_1.63.2-1639562499_amd64.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package code_1.63.2-1639562499_amd64.deb
E: Couldn't find any package by glob 'code_1.63.2-1639562499_amd64.deb'
E: Couldn't find any package by regex 'code_1.63.2-1639562499_amd64.deb'
3) [sudo] [apt] [install] ./code_1.63.2-1639562499_amd64.deb
Reading package lists... Done
E: Unsupported file ./code_1.63.2-1639562499_amd64.deb given on commandline
So, in the end I double clicked the .deb file, and it installed itself. I didn't see that method on the VSC website! In your face Computer Science! Should I have put a comma before Computer Science?