fix: allow manage error page from docusaurus and not ngnix

[jairoFernandez]

associated to https://github.com/kubefirst/docs/issues/721

Actually the ngnix server try to list the directory, for that reason, when you try to access to first level, like /akamai/ you receive a 403 code:

now, we'll receive a 404 managed by docusaurus:

Another thing, I added a redirect from /google/ to /gcp/ as a temporal solution of https://github.com/kubefirst/docs/issues/721.

[fharper]

Thanks for this fix Jairo!