This entire repo is outdated for Architect v10

I'm noticing that there are many things that are now deprecated in this repo. For example: 

The usage of [deprecated env vars](https://arc.codes/docs/en/about/upgrade-guide#:~:text=Due%20to%20ongoing,staging%20%2B%20production):
`ENV['NODE_ENV']`
`ENV['ARC_CLOUDFORMATION']`

I'd like to help on upgrading, is it a matter of updating or plainly removing these env vars? 
