Previously, due to a bug in Firebase hosting, requests to
`/index.html?<query>` would lead to an infinite redirect and eventually
a failure. This affected, for example, cache-busting requests from the
ServiceWorker, which look like: `/index.html?ngsw-cache-bust=...`
For more details see
https://github.com/angular/angular/issues/42518#issuecomment-858545483
This commit temporarily works around the bug by explicitly redirecting
`/index.html?<query>` to `/?<query>`.
Fixes#42518
PR Close#42547
56a0582d79