Docs for seeding needs an update

[camstuart]

It seems that the documentation for seeding services at: https://docs.feathersjs.com/guides/advanced/seeding-services.html

needs to be updated to suit the structure that is being created by the feathers cli.

It looks like adding seeding to src/server.js would instead be in src/index.js?

Even better yet, when the feathers-cli prompts for authentication (with username and password) we should add seeding of a default user (id there are zero users in the database)

This way, seeding would already be set up for the most common seeding use case