move doctors to their own table

Server/Server/Models/Doctor.cs

@@ -1,15 +1,12 @@
 using System.Runtime.Serialization;
+using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.Models
 {
+    [Table("Doctors")]
     [DataContract]
     public class Doctor : Person
     {
-        private int _DoctorID;
-
-        [DataMember]
-        public int DoctorID { get => _DoctorID; set => _DoctorID = value; }
-
         public Doctor() { }
         public Doctor(string firstName, string lastName, Gender gender, Salutation salutation,
                        string streetName, string streetNumber, City city)