Add first subscriber use case (#23)

* Add CoursesCounter, suscriber and repository

* Add mother class and TestCase - Mapping database

* Test publish domain and change FakeItEasy by Moc + refactor infrastructure case + apply InMemoryContext

* Added DomainEventInformation and Deserializer logic

* Add ability to test domain events from Specflow

Raise domain event on course created

All test infrastructure to support Entity Framework (#2)

Implement MySql Courses repository & infrastructure tests
Added all the related infrastructure to set up and clean the databases

* Implement TestServer using mysql and infrastructure test

* Refactoring Factory and SpecFlow

* Refactoring Infrastructures test cases

Add EfCore integration and renaming properties

* Persist value object into EF Core and renaming properties

* remove unnecessary set property

* Add await in test files

Add semantics to the tests

Add Object Mother

Add Value Objects

Add CourseCreator and Course, CourseRepository and FileCourseRepository

Add docker support

Add CoursePut controller + bdd test + renaming namespaces