3xx Response Body is being dropped

[jhunt]

(Note: this is conjecture, in need of steps to reproduce)

It appears that when gotcha is returning redirects to the front-end (vs. following them itself), it drops the response body. This caused a bit of confusing when we were using gotcha to introspect an API that was including object JSON in its 302 responses.

Figure out how to reproduce, verify, and fix.

[jhunt]

Turns out the code we were exercising was following redirects, and we were seeing the body of the redirect destination. See if we can build a small API that does a 30x with a payload, and see what it looks like for Gotcha.