add simple editor UI and backend

editor/server/editor.py

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: MIT
+
+import os
+
+from flask import (
+    Blueprint,
+    send_from_directory,
+)
+
+from . import get_common_cf_template_params, render_cf_error_page
+
+root_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../')
+res_folder = os.path.join(root_dir, 'editor/resources')
+
+bp = Blueprint('editor', __name__, url_prefix='/')
+
+
+@bp.route('/', defaults={'path': 'index.html'})
+@bp.route('/<path:path>')
+def index(path: str):
+    return send_from_directory(res_folder, path)