Filter out internal traffic on Google Analytics

Since we'll be remote for a while, we should look into ways to filter out staff traffic.

We currently have the following filters applied to our alpha.austin.gov property:

These no longer apply and our views are no longer only capturing "external" traffic. For Alpha, this would be helpful in helping us gather insights. Since it would be difficult to track dynamic IPs, one solution discussed is adding a cookie that is managed through Google Tags. [Learn more about this solution here](https://www.joshuamorse.com/2015/06/14/filtering-internal-employees-in-google-analytics-using-google-tag-manager/)

Things to consider
- Determining who should be filtered out (ODD, CoA employees?)
- If a cookie is created, how often should we remind people to install it (since people clear their cache)?
- How will the cookie be added to internal users' browsers? Via a link?
- Is there are alternate way to filter out internal IPs?