feat: add the new reminders app

src/reminders/serialisers.py

@@ -0,0 +1,14 @@
+from documents.models import Document
+from rest_framework import serializers
+
+from .models import Reminder
+
+
+class ReminderSerializer(serializers.HyperlinkedModelSerializer):
+
+    document = serializers.HyperlinkedRelatedField(
+        view_name="drf:document-detail", queryset=Document.objects)
+
+    class Meta(object):
+        model = Reminder
+        fields = ("id", "document", "date", "note")