update: default duration 0

src/common/models/exercise.model.ts

@@ -30,7 +30,7 @@ export interface IExercise {
 const exerciseSchema = new Schema<IExercise>({
   name: { type: String, required: true, unique: true, dropDups: true },
   category: { type: String, required: true },
-  duration: { type: Number, required: false },
+  duration: { type: Number, required: false, default: 0 },
   exerciseType: {
     type: String,
     required: false,

src/seeder/seeders/5-exercises.seeder.ts

@@ -18,6 +18,7 @@ export default seederWrapper(Exercise, async () => {
         {
           reps: Math.floor(Math.random() * 10),
           sets: e.sets,
+          duration: 0,
         } 
         ||
         {