Early failure message when backend is down.

[adeelkhan]

WIP:
This patch would enable MFE to fail early just in
case of backend (LMS) is down and it want to show some user
facing page instead of showing a blank page.

VAN-129

[davidjoy]

Some initial thoughts -

1. Can you describe in a bit more detail the situation this is addressing? I'm not sure I understand what issues we're running into.
2. I think if we provide an option for this, it should likely be an option on the initialize function which can be passed in when the application is started up. If an application is providing some alternate handling, then that won't be changing on a per-deployment basis. Environment variables are useful for when we want to change behavior depending on the environment (dev, prod, Open edX instances, etc.), but I don't think that's the case here.
3. SHOULD_RETRY is pretty vague; if we do add an option, it should be unambiguous.

[abdullahwaheed]

Hi @adeelkhan! This PR is inactive for quite a time now, could you please resolve the conversation and update your PR

[openedx-webhooks]

Although this pull request is already closed, I'm still watching it for updates.

There is nothing you have to do. No action is needed from your side. Thanks.