Check that an API works

A smoke test: a few users, a few seconds. It tells you the API answers and does not fail.

vegaload run -target http://127.0.0.1:8080/widgets -protocol http1 -vus 5 -duration 10s

Look at failed (it should be 0) and p95 (the time that 95 out of 100 requests beat). Run this before any bigger test.