Adding a new config option, ``sentryDSN`` to provide the Sentry DSN if
the user wants to monitor the BGPalerter app for runtime exceptions.
I have updated the package.json file to the version recommended in
https://docs.sentry.io/error-reporting/quickstart/?platform=node.
This is an optional config bit that enables Sentry monitoring only when
``sentryDSN`` is provided.
enabling this option with the supplied example config would error out that MonitorAS.js couldn't be found, the others were lowercase, this fixed the issue for me.
Move config.yml to prevent accidental pushing one's config (or
accidental overwriting one's local config with the upstream version)
Add config.yml to .gitignore