1. Create a solution named DoctorWho with a web application project named DoctorWho.Web.
2. Add DoctorWho.Db project from the EF core exercise to the solution and reference it from DoctorWho.Web project.

For each of the next APIs: - Separate DB entity models from outer facing models. - Setup AutoMapper profiles to map between these models. - Use FluentValidation to setup the necessary validation rules. - Handle all type of faults that can be thrown. 3. Create a controller for the doctors with a Get all doctors API. 4. Add Upsert API for the doctors, and make it return the upserted entity. - DoctorNumber and DoctorName are required. - LastEpisodeDate should has no value when FirstEpisodeDate has no value. - LastEpisodeDate should be greater than or equal to FirstEpisodeDate. 5. Add Delete API for the doctors. 6. Create a controller for the episodes with a Get all episodes API. 7. Add Create API for the episodes, and make it return the new entity id. - AuthorId and DoctorId are required. - SeriesNumber should be 10 characters long. - EpisodeNumber should be greater than 0. 8. Add AddEnemyToEpisode API. 9. Add AddCompanionToEpisode API. 10. Create a controller for the authors with an Update API for the authors. 11. Move DB connection string out of the DbContext to AppSettings.json.