Fix image and media loading when using external storage server

Fixes #2479

spec/requests/content_security_policy_spec.rb

@@ -12,9 +12,9 @@ describe 'Content-Security-Policy' do
       "default-src 'none'",
       "frame-ancestors 'none'",
       "font-src 'self' https://cb6e6126.ngrok.io",
-      "img-src 'self' data: blob: https://cb6e6126.ngrok.io",
+      "img-src 'self' data: blob: https://cb6e6126.ngrok.io https://cb6e6126.ngrok.io",
       "style-src 'self' https://cb6e6126.ngrok.io 'nonce-ZbA+JmE7+bK8F5qvADZHuQ=='",
-      "media-src 'self' data: https://cb6e6126.ngrok.io",
+      "media-src 'self' data: https://cb6e6126.ngrok.io https://cb6e6126.ngrok.io",
       "frame-src 'self' https:",
       "manifest-src 'self' https://cb6e6126.ngrok.io",
       "form-action 'self'",