Hi,

when I install a new server version, I redirect my URL to a "under
construction" page beforehand. Then I undeploy the app and redeploy
it.

However, during this process the clients often still have the old app
in their browsers. When the new app is deployed they may receive
"incompatible" errors. When the new app is still not deployed, they
receive "not available" errors. In both cases, a browser reload will
help, either by serving the new app or by serving the "under
construction" page.

My problem is that even if I do the redirect, the clients do not see
the "under construction" page, because the app is still in the
browsers and struggles with errors.

Is there a mechanism, so that the apps in the browsers inform the user
that a reload is required when a) the app is not available or b) the
server's app is newer than the browser's version?

Or how do you deal with this problem?

Thanks
Magnus

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