Merge pull request #3 from Authress/wparad/improve-contribution-guide

add sanitize trailing slashes to contribution guide.

contributing.md

@@ -32,6 +32,7 @@ podman stop $CID && podman rm $CID
 
 ### Common review items
 * [ ] Inputs to Constructor are (string: authress_api_url, string: service_client_access_key)
+* [ ] authress_api_url should sanitize https:// prefix and remove trailing `/`s
 * [ ] Add authentication to the configuration class.
 * [ ] Change configuration class name to be `AuthressSettings`
   * Specify all the inputs to be consistent across languages