Move apps in main directory

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

logs/api/serializers.py

@@ -0,0 +1,19 @@
+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from rest_framework import serializers
+
+from ..models import Changelog
+
+
+class ChangelogSerializer(serializers.ModelSerializer):
+    """
+    REST API Serializer for Changelog types.
+    The djangorestframework plugin will analyse the model `Changelog` and parse all fields in the API.
+    """
+
+    class Meta:
+        model = Changelog
+        fields = '__all__'
+        # noinspection PyProtectedMember
+        read_only_fields = [f.name for f in model._meta.get_fields()]  # Changelogs are read-only protected