* Beacon node setup improvements

* Update op-node/flags/flags.go
Co-authored-by: protolambda <proto@protolambda.com>

* Add option to not half op-node startup on failed check

* Update op-node/flags/flags.go
Co-authored-by: protolambda <proto@protolambda.com>

* op-node: improve beacon-API configuration handling

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Co-authored-by: protolambda <proto@protolambda.com>