enhancementhelp wanted
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heya, I've been running valhalla using Docker and docker-compose.
when running the docker-compose down command a SIGTERM signal is first sent to the process and then it waits an interval (default 10s) before sending it a SIGKILL.
it seems like valhalla_route_service is ignoring the SIGTERM signal.
because of how docker runs the process as PID 1 it behaves a little differently regarding trapping signals, it might require that the signal is explicitly trapped with code.
eg: (in nodejs):
process.on('SIGTERM', function(){ app.close(); });
the benefit is that valhalla docker containers would restart almost instantly, rather than waiting ~10s for the SIGKILL.