good forst commit

apps/api/src/modules/auth/dto/signup.dto.ts

@@ -0,0 +1,24 @@
+import { IsEmail, IsString, Matches, MaxLength, MinLength } from 'class-validator';
+
+export class SignupDto {
+  @IsString()
+  @MinLength(2)
+  @MaxLength(80)
+  tenantName!: string;
+
+  // Lowercase, alphanumeric + dashes, 2-40 chars, must start with a letter
+  @IsString()
+  @Matches(/^[a-z][a-z0-9-]{1,39}$/, {
+    message:
+      'tenantSlug must be 2-40 chars, start with a letter, and contain only lowercase letters, digits, and dashes',
+  })
+  tenantSlug!: string;
+
+  @IsEmail()
+  email!: string;
+
+  @IsString()
+  @MinLength(8)
+  @MaxLength(128)
+  password!: string;
+}