Indicate the maximum amount of teams in a tournament

apps/participation/migrations/0003_tournament_max_teams.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.11 on 2020-12-31 11:25
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('participation', '0002_auto_20201230_1302'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='tournament',
+            name='max_teams',
+            field=models.PositiveSmallIntegerField(default=9, verbose_name='max team count'),
+        ),
+    ]