feat(docs): Add page discussing environment variables

[jacc]

While there is already documentation around project secrets, I could not find anything about environment variables and their distinguishing features versus project secrets. This copy is essentially edited around the project secrets doc page, and might be better off merging variables as a whole into one doc page.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
docs	✅ Ready (Inspect)	Visit Preview	Oct 6, 2022 at 10:52PM (UTC)

[pxseu]

Environment variables and secrets are not interchangeable names. A project secret has its value as any string hover you cannot view it after creation and they are set per project. Environment variables are editable and viewable. They can be any string in addition to a secret ie a secret can be used as an environment variable value.

[imfunniee]

cobol 👍

[jacc]

Environment variables and secrets are not interchangeable names. A project secret has its value as any string hover you cannot view it after creation and they are set per project. Environment variables are editable and viewable. They can be any string in addition to a secret ie a secret can be used as an environment variable value.

Gotcha. Will update my PR to include this differentiation. Anything else?

[pxseu]

Gotcha. Will update my PR to include this differentiation. Anything else?

Replace

hop deploy --env TOKEN="${env.TOKEN}"

to just

hop deploy --env TOKEN=VALUE

since that caught my eye mostly.

[alii]

& also possible to fix this error when it builds ❤️ —

[alii]

Would it be possible to add some more information under "Usage with API" — perhaps it would be easier to change to an example with the JS SDK