Setup server unit tests

[ianb]

We can start simple: GET /, PUT/GET /data/someId, GET /someId – just a smoke test, though ideally end-to-end (not just calling functions).

[ianb]

For now, let's do a simple end-to-end integration test (over HTTP) that tests creating a shot and getting it back. This wouldn't include any testing of the addon. So it would be like:

PUT {dev_backend}/data/{random}/domain
{... test data ...}

And then expect back a specific response, and test that the response looks sane. Later we can look at including the addon in tests.

[ianb]

We've done this in test/server