init commit

exercise/migrations/0003_exercise_duration.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.2 on 2023-06-14 13:23
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('exercise', '0002_alter_exercise_options'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='exercise',
+            name='duration',
+            field=models.IntegerField(blank=True, max_length=4, null=True),
+        ),
+    ]