Add docs for Pre-Releases (#2505)

## Issue Addressed

NA

## Proposed Changes

When we released [`v1.4.0-rc.0`](https://github.com/sigp/lighthouse/releases/tag/v1.4.0-rc.0), we added a bunch of text about pre-releases. That information was useful, but somewhat hard to reference in future pre-releases.

This PR adds some docs to the book so whenever we do a pre-release we can point users to these docs for more info.

## Additional Info

NA
This commit is contained in:
Paul Hauner 2021-08-09 02:43:04 +00:00
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* [Advanced Networking](./advanced_networking.md)
* [Running a Slasher](./slasher.md)
* [Redundancy](./redundancy.md)
* [Pre-Releases](./advanced-pre-releases.md)
* [Contributing](./contributing.md)
* [Development Environment](./setup.md)
* [FAQs](./faq.md)

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# Pre-Releases
[sigp/lighthouse]: https://github.com/sigp/lighthouse
[sigp/lighthouse/releases/latest]: https://github.com/sigp/lighthouse/releases/latest
[sigp/lighthouse/releases]: https://github.com/sigp/lighthouse/releases
[`v1.4.0-rc.0`]: https://github.com/sigp/lighthouse/releases/tag/v1.4.0-rc.0
[`v1.4.0`]: https://github.com/sigp/lighthouse/releases/tag/v1.4.0
From time-to-time, Lighthouse *pre-releases* will be published on the [sigp/lighthouse] repository.
These releases have passed the usual automated testing, however the developers would like to see it
running "in the wild" in a variety of configurations before declaring it an official, stable
release. Pre-releases are also used by developers to get feedback from users regarding the
ergonomics of new features or changes.
Github will clearly show such releases as a "Pre-release" and they *will not* show up on
[sigp/lighthouse/releases/latest]. However, pre-releases *will* show up on the
[sigp/lighthouse/releases] page, so **please pay attention to avoid the pre-releases when you're
looking for stable Lighthouse**.
### Examples
[`v1.4.0-rc.0`] has `rc` (release candidate) in the version string and is therefore a pre-release. This
release is *not* stable and is *not* intended for critical tasks on mainnet (e.g., staking).
However, [`v1.4.0`] is considered stable since it is not marked as a pre-release and does not
contain `rc` in the version string. This release is intended for use on mainnet.
## When to use a pre-release
Users may wish to try a pre-release for the following reasons:
- To preview new features before they are officially released.
- To help detect bugs and regressions before they reach production.
- To provide feedback on annoyances before they make it into a release and become harder to change or revert.
## When *not* to use a pre-release
It is not recommended to use pre-releases for any critical tasks on mainnet (e.g., staking). To test
critical features, try one of the testnets (e.g., Prater).