systemd's user units are buggy on certain versions
and do not linger by default.

Closes #1771
Closes #1673
Closes #1882
Closes #1861

* instanceIp --> username@instanceIp

* [user]@<instance-ip>
Co-authored-by: NAnmol Sethi <hi@nhooyr.io>
Co-authored-by: NAnmol Sethi <hi@nhooyr.io>

Made it a full alternative to caddy, just so we don't ever have to explain how to configure Nginx again.

Added Nginx instructions for people who prefer to use this instead of Caddy

See https://github.com/cdr/code-server/issues/1337#issuecomment-632131384

Closes #1699

This release fixes bugs introduced with the release of v3.3.0

- We've reverted to VS Code 1.45.1 due to bugs in 1.46 #1667
- Accessing code-server from a web browser on Windows has been fixed #1642
- Search in project has been fixed #1665
- The glibc requirement on static releases has been lowered to v2.19 #1656

I expect people will frequently link to it.

🚀