Reduce gem size and remove yarn install warning when building docs site

[deivid-rodriguez]

The biggest file in our gem package is docs/package-lock.json but I don't think it's needed since the documentation site uses yarn.

Removing it should reduce the gem package size.

It also fixes the following yarn install warning:

➜  docs git:(main) yarn install
yarn install v1.22.18
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/4] 🔍  Resolving packages...
(...)

[scarroll32]

This looks good to me @deivid-rodriguez, we will need to manually deploy the docs site afterwards.

I have opened #1298 to make that an automatic process.

[scarroll32]

@deivid-rodriguez the code looks fine but I don't have time to manage the site build right now, so I will merge this tonight or tomorrow.

[deivid-rodriguez]

Thanks @scarroll32, yeah, we should definitely deploy automatically.

[scarroll32]

Thanks @deivid-rodriguez