Added authservice Contributing.md
Package Merge Request
Package Changes
https://repo1.dso.mil/platform-one/big-bang/apps/core/authservice/-/blob/0.5.1-bb.4/CHANGELOG.md
Package MR
https://repo1.dso.mil/platform-one/big-bang/apps/core/authservice/-/merge_requests/82
For Issue
Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/authservice/-/issues/45
Edited by Branden Cobb