I started writing example service but this proven to be inefficient way of doing things.
Considering current state of the SDK it's best to provide comprehensive documentation without example.

Reasons:

• Example service should be done by separate developer based on current documentation to provide feedback
• SDK is in early stage and introducing example as module may cause additional overhead - example in top level app serves the same purpose.
• Example service will include lots of files and specifications that are not essential for the actual service developers.
• Example service will be hard do showcase actual usage (documentation + example project will be much efficient and explanatory to service developer).
• There is no need for template as every service will be different and we should abstract actual of service details.