text: import mongoose, { Schema } from 'mongoose';
  
  const ExerciseSchema = new Schema(
    {
      course_id: {
        type: String,
        required: true,
      },
      exercise_presentation_url: {
        type: String,
        required: true,
      },
      exercise_points: {
        type: String,
        required: true,
      },
    },
    {
      timestamps: true,
    }
  );
  
  const exercise = mongoose.model('Exercise', ExerciseSchema);
  
  export default exercise;
  