Add support for CORS with Django (#2090)

* Add support for CORS with Django

* Update settings.py

per https://pypi.org/project/django-cors-headers/

Author: webb-ben

pygeoapi/django_/settings.py

@@ -175,3 +175,10 @@
 # Defaults to True in Django
 # https://docs.djangoproject.com/en/3.2/ref/settings/#append-slash
 APPEND_SLASH = not API_RULES.strict_slashes
+
+# CORS: optionally enable from config.
+if PYGEOAPI_CONFIG['server'].get('cors', False):
+    INSTALLED_APPS.append('corsheaders')
+    MIDDLEWARE.insert(0, 'corsheaders.middleware.CorsMiddleware')
+
+    CORS_ORIGIN_ALLOW_ALL = True

requirements-django.txt

@@ -1,2 +1,3 @@
 Django
+django-cors-headers
 pydantic