make point nullable (#457)

libs/common/src/modules/booking/entities/bookable-space.entity.ts

@@ -40,8 +40,8 @@ export class BookableSpaceEntity extends AbstractEntity {
   @Column({ type: Boolean, default: true })
   active: boolean;
 
-  @Column({ type: 'int' })
-  points: number;
+  @Column({ type: 'int', default: null })
+  points?: number;
 
   @CreateDateColumn()
   createdAt: Date;