## Issue Addressed - N/A
## Proposed Changes
Adding badge to contribution docs that shows the number of minted GitPOAPs
## Additional Info
Hey all, this PR adds a [GitPOAP Badge](https://docs.gitpoap.io/api#get-v1repoownernamebadge) to the contribution docs that displays the number of minted GitPOAPs for this repository by contributors to this repo.
You can see an example of this in [our Documentation repository](https://github.com/gitpoap/gitpoap-docs#gitpoap-docs).
This should help would-be contributors as well as existing contributors find out that they will/have received GitPOAPs for their contributions.
CC: @colfax23 @kayla-henrie
Replaces: https://github.com/sigp/lighthouse/pull/3330
Co-authored-by: Michael Sproul <micsproul@gmail.com>
## Issue Addressed
NA
## Proposed Changes
Updates the validator guide to provide instructions for mainnet users.
## Additional Info
- ~~Blocked on #1751~~
