feat: add validation to prevent class creation for past dates

src/modules/class/class.service.ts

@@ -110,6 +110,10 @@ export class ClassService {
 
 		const date = moment(createRoomClassDto.date);
 
+		// Check if the date is before the current date
+		if (date.isBefore(moment().startOf("day")))
+			throw new HttpException("Can't create a room for a class that has passed", 400);
+
 		const firstTimeStart = createRoomClassDto.times.reduce((prev, current) =>
 			moment(current.start, "HH:mm").isBefore(moment(prev.start, "HH:mm"))
 				? current