minor corrections and remarks

[colorcube]

collectionName

@entity.name('user').collectionName('users')

should be

@entity.name('user').collection('users')

@http.controller()

Controller have decorators in example code

@http.controller()
export class HelloController {

but not in the docs

DatabaseInterface

In the docs DatabaseInterface is mentioned, but doesn't exists.
It is an abstract example I guess but it's confusing