Specifically, if they set a 'notes' property on their metadata object,
it will be displayed in the console version of their results, for
easier debugging.
sequelize is really confusing and the healthcheck seems to be failing
on staging with "undefined is not a function". Hopefully just using
mysql and executing SHOW TABLES as a connection test will fix this.
The health check ensures that s3, aestimia, openbadger, and MySQL
connections are all functional.
Currently the cookie secret is used as the password at /health_check but
we can change this later in app.js.