Graceful Shutdown

[bert2002]

Hi,

when running esplora with the current docker container, the shutdown procedure [1] is very hard on the bitcoin node. Most of the time it will not make a clean shutdown and then needs to recover at the next start. Is there a reason why this is such a hard kill? Even if bitcoind takes some time to shutdown, it will do this.

If there are no objections, would be happy to submit a PR to make this more graceful.

Thanks,
bert

[1] https://github.com/Blockstream/esplora/blob/master/contrib/runit_boot.sh#L16