fix docker build

api/src/entities/RecurringExpense.ts

@@ -1,4 +1,5 @@
 import { Column, CreateDateColumn, Entity, ManyToOne, PrimaryGeneratedColumn, UpdateDateColumn } from 'typeorm';
+import type { Relation } from 'typeorm';
 import { Category } from './Category.js';
 import { User } from './User.js';
 import { decimalTransformer } from '../utils/decimal.js';
@@ -72,8 +73,8 @@ export class RecurringExpense {
   updatedAt!: Date;
 
   @ManyToOne(() => User, { onDelete: 'CASCADE' })
-  user!: User;
+  user!: Relation<User>;
 
   @ManyToOne(() => Category, { eager: true, onDelete: 'RESTRICT' })
-  category!: Category;
+  category!: Relation<Category>;
 }