Revert "remove application level CORS (leave to server)"

This reverts commit 8e931e644f.

pygeoapi/flask_app.py

@@ -34,6 +34,7 @@ import yaml
 import click
 
 from flask import Flask, make_response, request
+from flask_cors import CORS
 
 from pygeoapi import views
 from pygeoapi.config import settings
@@ -109,6 +110,9 @@ def serve(ctx, debug=False):
     if not settings['server']['pretty_print']:
         APP.config['JSONIFY_PRETTYPRINT_REGULAR'] = False
 
+    if settings['server']['cors']:
+        CORS(APP)
+
     setup_logger()
     # TODO: get scheme
     BASEURL = get_url('http', settings['server']['host'],