Alert on prod if ENABLE_GOOGLE_ANALYTICS is missing

[kalvinwang]

Description

We want to log and alert in production Azure if ENABLE_GOOGLE_ANALYTICS is missing. We don't want to log or alert in other environments. In order to do this, we need a way to determine what Azure environment the code is running in, e.g. by creating a new environment variable.

Acceptance Criteria

• Set up a way to determine the running Azure environment (E.g. a new env var)
• Log and alert in prod Azure if ENABLE_GOOGLE_ANALYTICS is missing