Background job may set ERROR

[ericpassmore]

The background job should check for a running nodoes. If there is no running nodoes it should set job to ERROR status. This is to prevent an instance from hanging if nodoes fails to start for some reason.

Background job should SIGHUP parent process, to clear host to process new jobs.

There may be a gap between the start of the background job and running of nodoes. Recommend first fail to create a file marking the failure, then susequent failures would check for the file and post ERROR state.

[ericpassmore]

This is the background job. https://github.com/eosnetworkfoundation/replay-test/blob/main/replay-client/background_status_update.sh