David Mehren 44ebf12d25 Automatically retry DB connection on startup ...

This adds retry logic to the initial DB connection on startup.
HedgeDoc now tries connecting to the database up to 30 times, waiting
one second after each try.
This gives a database that was simultaneously started (e.g. via
docker-compose) enough time to get ready to accept connections.

Signed-off-by: David Mehren <git@herrmehren.de>

2021-08-14 22:23:08 +02:00

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