Include instructions for setting up Grafana Alerts and/or CloudWatch Alarms

[kylesomers]

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After setting up Grafana, developers can create Grafana Alerts based on their requirements. However, there should be some steps provided in this project that show how to do this with a few examples provided such as:

Ex 1: Generate alert if the error rate in a specific Edge Location exceeds a threshold over a period of time. This can help operators determine if there are specific issues in a particular edge location. Other higher cardinality dimensions may also be of value, such as URI or the source country.

Ex 2: Generate alert if bytes downloaded exceeds any statically defined thresholds that can be set by the developer. This is useful if an operator wants to receive alerts if they exceed expected usage in certain edge locations.