sharding

Description

The Lighthouse book does not currently list all command line options/arguments for reference

Version

The Lighthouse book does not appear to be versioned

Present Behaviour

Currently some specific command line options are given under particular sections, but there is not exhaustive list in one place.

Expected Behaviour

There should be a page in the Lighth

• Introduce and implement circuit breaker pattern for weaver

At least this util is dead code and could be removed https://github.com/ChainSafe/lodestar/blob/master/packages/lodestar/src/util/io.ts

It would be nice to run ts-prune on each package of the monorepo to find and delete dead code

recently CI failed many times testing cluster because of port already used, which can be very annoying.