Add django cors headers to backend

backend/requirements.txt

@@ -1,3 +1,4 @@
 Django==3.2.8
 psycopg2-binary>=2.8
 djangorestframework==3.12.4
+django-cors-headers==3.10.0

backend/right_tree/settings.py

@@ -39,6 +39,7 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
 
     'rest_framework',
+    'corsheaders',
 
     'right_tree.api',
 ]
@@ -51,6 +52,7 @@ MIDDLEWARE = [
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    'corsheaders.middleware.CorsMiddleware',
 ]
 
 ROOT_URLCONF = 'right_tree.urls'
@@ -131,3 +133,11 @@ STATIC_URL = '/static/'
 # https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+CORS_ALLOWED_ORIGINS = [
+    'http://localhost:3000' # Update this for production
+]
+
+CORS_ALLOW_HEADERS = [
+    'access-control-allow-origin'
+]