* feat: Add AWS instance identity authentication
This allows zero-trust authentication for all AWS instances.
Prior to this, AWS instances could be used by passing `CODER_TOKEN`
as an environment variable to the startup script. AWS explicitly
states that secrets should not be passed in startup scripts because
it's user-readable.
* Fix sha256 verbosity
* Fix HTTP client being exposed on auth
* feat: Add TLS support
This adds numerous flags with inspiration taken from Vault
for configuring TLS inside Coder.
This enables secure deployments without a proxy, like Cloudflare.
* Update cli/start.go
Co-authored-by: Colin Adler <colin@coder.com>
* Fix flag help in coder.env
Co-authored-by: Colin Adler <colin@coder.com>