Display metadata about metrics

[vingkan]

The list of metrics available to frontend features are defined in app/site/metrics.js. Currently, the metric config objects contain these fields:

  rideshare_pickups_covid: {
    name: "Rideshare Pickups Since March 2020",
    units: "trips",
    format: Formatter.numberInMillions,
    fullFormat: Formatter.numberWithCommas,
  },

In order to responsibly display data on our website, we are missing some important information:

• Source of the data
• Description of the metric
• Methodological information, like sample size or other information needed to interpret the metric

We could add this information to each config object as new fields, or within a field called metadata. Any other ideas for how to design this?