Hash password with bcrypt and store in config.yaml

Problem

As a user, I would like to be able to hash my password using the same bcrypt algorithm used by code-server.

However, the bcrypt and bcrypt.js algorithms are different so you can't in the same way you can with sha256.

Add a CLI option to set password (which we hash for User using bcrypt)

code-server --config password=<password> -> hashes and stores in config.yaml

(open to other ideas for this though^)

Todos

update docs
add backwards-compatiblity for those still hashing with sha256
let user provide password via stdin to avoid having the plaintext password in their shell history

would be good if the user could provide password via stdin to avoid having the plaintext password in their shell history.

@rabidpug

Didn't even think to consider that - great point @rabidpug 👍

would be good if the user could provide password via stdin to avoid having the plaintext password in their shell history.

Put a space before your command, this way it won't be stored in history.

Merging with #3546