allow emails without a tld (#2762)

It's perfectly valid to have an email address without a TLD, for instance:

- test@localhost
- test@svc-in-same-k8s-namespace
- test@internal-corp

Fixes #2667

server/src/domain/auth/dto/login-credential.dto.spec.ts

@@ -3,6 +3,15 @@ import { validateSync } from 'class-validator';
 import { LoginCredentialDto } from './login-credential.dto';
 
 describe('LoginCredentialDto', () => {
+  it('should allow emails without a tld', () => {
+    const someEmail = 'test@test';
+
+    const dto = plainToInstance(LoginCredentialDto, { email: someEmail, password: 'password' });
+    const errors = validateSync(dto);
+    expect(errors).toHaveLength(0);
+    expect(dto.email).toEqual(someEmail);
+  });
+
   it('should fail without an email', () => {
     const dto = plainToInstance(LoginCredentialDto, { password: 'password' });
     const errors = validateSync(dto);

server/src/domain/auth/dto/login-credential.dto.ts

@@ -3,7 +3,7 @@ import { Transform } from 'class-transformer';
 import { IsEmail, IsNotEmpty, IsString } from 'class-validator';
 
 export class LoginCredentialDto {
-  @IsEmail()
+  @IsEmail({ require_tld: false })
   @ApiProperty({ example: 'testuser@email.com' })
   @Transform(({ value }) => value.toLowerCase())
   email!: string;

server/src/domain/auth/dto/sign-up.dto.spec.ts

@@ -30,6 +30,20 @@ describe('SignUpDto', () => {
     expect(errors[0].property).toEqual('email');
   });
 
+  it('should allow emails without a tld', () => {
+    const someEmail = 'test@test';
+
+    const dto = plainToInstance(SignUpDto, {
+      email: someEmail,
+      password: 'password',
+      firstName: 'first name',
+      lastName: 'last name',
+    });
+    const errors = validateSync(dto);
+    expect(errors).toHaveLength(0);
+    expect(dto.email).toEqual(someEmail);
+  });
+
   it('should make the email all lowercase', () => {
     const dto = plainToInstance(SignUpDto, {
       email: 'TeSt@ImMiCh.com',

server/src/domain/auth/dto/sign-up.dto.ts

@@ -3,7 +3,7 @@ import { Transform } from 'class-transformer';
 import { IsEmail, IsNotEmpty, IsString } from 'class-validator';
 
 export class SignUpDto {
-  @IsEmail()
+  @IsEmail({ require_tld: false })
   @ApiProperty({ example: 'testuser@email.com' })
   @Transform(({ value }) => value.toLowerCase())
   email!: string;