Created feeds and UI for feeds and newsletter

Signed-off-by: rodude123 <rodude123@gmail.com>

src/api/utils/middleware.php

@@ -65,7 +65,12 @@ class middleware
         $app->add(function ($request, $handler)
         {
             $response = $handler->handle($request);
-            return $response->withHeader("Content-Type", "application/json");
+            $contentType = $response->getHeaderLine("Content-Type");
+            if (empty($contentType) || $contentType === "text/html")
+            {
+                return $response->withHeader("Content-Type", "application/json");
+            }
+            return $response;
         });
     }