Staging environment

[wdanfort]

Will be helpful to have a staging environment as more people use service and features become more complex to avoid major service disruptions and breaking changes. Potentially we can use our original Twilio number?

[ianhoffman]

Hmm. A few things about this:

• A staging env will cost money since we'll need to double pay for infra in AWS. So expect roughly 2x our current monthly AWS costs — an extra $40 a month at least.
• Most of the bugs we'd prevent in a staging env can also be prevented via local testing. We're such a small operation, I think it's totally acceptable to just have a local dev env and a prod env ATM.

So I'd recommend tabling this for now.