Security best practices for the instance metadata service does not mention configuring HTTPS

[jjfall]

The metadata service was updated to support a secure (HTTPS) connection from the guest VM to the metadata service, but the subject article was not updated to advise a customer to configure their metadata service for a secure connection.

Here is the article that can be referenced in a new section in the best practices article: https://cloud.ibm.com/docs/vpc?topic=vpc-imd-configure-service&interface=ui#secure-access-ui

Please reach out to the metadata team to ask for help on this update at #instance-metadata-dev or #instance-metadata-support. @fode is the architect/lead. Thank you.

[keith-merchant-ibm]

Closing and tracking internally.