Add E2E startup instructions (#11137)
Add E2E startup instructions (#11137)

* add e2e instructions

* add instructions for accessing admin console

* apply suggestions

* Apply suggestions from code review

Co-authored-by: May Lee <9c6ab48ff59eb71050ff171c9b20dee762d98868@datadoghq.com>

Co-authored-by: May Lee <9c6ab48ff59eb71050ff171c9b20dee762d98868@datadoghq.com>
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core