Vagrant

Of the learning environments that leverage Ansible, very few are using roles. This can make porting Ansible playbooks across learning environments more difficult. To fix this, Ansible-using learning environments need to be refactored (where possible) to use an Ansible role.

Current HTTP (obsidian) errors are reported via the HttpError type. This is an idiosyncratic solution, which also doesn't capture all the possible errors. Instead, we should use middleware to capture and report 100% of the HTTP errors

Deliverables

1. Remove HttpError from the codebase. Instead, either use echo.HTTPError directly, or use/create a convenience function to convert grpc errors to ech

Some old programs versions can be found here if someone needs them to test old exploits for instance.