content: Lighthouse docs should follow Lighthouse defaults

[plato-gno]

Our Lighthouse docs currently differ from Lighthouse's file structure and defaults.

We should try to stick as close to Lighthouse's defaults, so we can refer the user as much as possible to their documentation. This reduces our long-term documentation lift.

This may require us to review how we structure our overall validator documentation, as we shift towards native client documentation.

Example 1: Different datadir

• Lighthouse Book: defaults to .lighthouse/gnosis
• Our documentation: /home/gnosis/consensus

See https://lighthouse-book.sigmaprime.io/validator-management.html

Example 2: Uses validator_definitions.yml to configure

• Lighthouse Book: https://lighthouse-book.sigmaprime.io/validator-management.html
• Our documentation: uses --password-file to handle passwords

See https://lighthouse-book.sigmaprime.io/validator-management.html

Example 3: Importing validator_keys

• Lighthouse book: imports from validator_keys directory
• Our documentation: uses different volumes

See https://lighthouse-book.sigmaprime.io/validator-import-launchpad.html