final phone validation move to ZZ default

close #16

src/models/actions/CreateParticipant.ts

@@ -1,5 +1,6 @@
 import { IsEmail, IsInt, IsNotEmpty, IsOptional, IsPhoneNumber, IsString } from 'class-validator';
 import { getConnectionManager } from 'typeorm';
+import { config } from '../../config';
 import { AddressNotFoundError, AddressWrongTypeError } from '../../errors/AddressErrors';
 import { Address } from '../entities/Address';
 
@@ -32,7 +33,7 @@ export abstract class CreateParticipant {
      */
     @IsString()
     @IsOptional()
-    @IsPhoneNumber("ZZ")
+    @IsPhoneNumber(config.phone_validation_countrycode)
     phone?: string;
 
     /**