improve getting started experience

[DanRoscigno]

Uptime has a good getting started experience, and the anomaly detection button on each monitor is wonderful. Unfortunately, the anomaly detection requires location (observer.geo.name) and the basic configuration provided in the getting started (Elastic Home > Add Metric Data > Uptime) does not provide location info in the snippet. Here is the example config:

heartbeat.monitors:
- type: http
  urls: ["http://elastic.co"]
  schedule: "@every 10s"

How about adding a second edit in the instructions it so that it includes observer.geo.name? Like so (just uncommenting geo and name):

processors:
  - add_observer_metadata:
      # Optional, but recommended geo settings for the location Heartbeat is running in
      geo:
        # Token describing this location
        name: us-east-1a
        # Lat, Lon "
        #location: "37.926868, -78.024902"