Deal with dev vs staging vs prod environments

[mikenikles]

Users who have the ya.js script installed have to make sure it doesn't get executed in non-prod environments. Figure out a way to make this as seamless as possible.

Some thoughts:

• Use the domain attribute on the script tag to specify.
  • Pros:
    • Simple implementation on my side
  • Cons:
    • It still requires users to set that depending on their environment
    • The developer experience is not as smooth as I'd prefer
• Set the domain attribute to the prod value always and use the HTTP request info (e.g. origin) in the events-api. Display all origins for a given domain attribute and let the user define environments. If origin and domain attribute match, we know it's production traffic. Flag every other origin as test.
  • Pros:
    • The simplest developer experience
  • Cons
    • Requires a setting in the UI and educating the users to configure environments