Adds instructions on where to go to test the running instance
Adds instructions on where to go to test the running instance

Readme instructed reader to run the app but didn't direct them where to
go to see the app running. This commit adds a message informing the
user where to go.

codeforamerica/ohana-api-admin,codeforamerica/ohana-api-admin,codeforamerica/ohana-api-admin,codeforamerica/ohana-api-admin