add requirement

+Django==3.1.2
+djangorestframework==3.12.1
+sqlparse==0.3.1
+pytz==2020.1
+django-cors-headers==3.5.0

@@ -10,6 +10,7 @@ For the full list of settings and their values, see
 https://docs.djangoproject.com/en/3.1/ref/settings/
 """
 
+import json
 from pathlib import Path
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
@@ -25,7 +26,7 @@ SECRET_KEY = '%n@_477ih_b6%(5zf34kuggj(50jc-cob$*#8$sse%1)^x#=(t'
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True
 
-ALLOWED_HOSTS = []
+ALLOWED_HOSTS = ['*']
 
 
 # Application definition
@@ -38,6 +39,8 @@ INSTALLED_APPS = [
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'api',
+    'rest_framework',
+    'corsheaders',
 ]
 
 MIDDLEWARE = [
@@ -48,6 +51,7 @@ MIDDLEWARE = [
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    'corsheaders.middleware.CorsMiddleware',
 ]
 
 ROOT_URLCONF = 'src.urls'