📖 Add automatic redirects for the development docs book to Netlify config

[detiber]

What this PR does / why we need it:

Adds automated redirects for the master/development version of the Cluster API book

/hold
Depends on: kubernetes/k8s.io#486

/assign @ncdc
/kind documentation

[k8s-ci-robot]

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[ncdc]

My only remaining question is just confirming that we don't have anything that cares about kubernetes-sigs-cluster-api.netlify.com, since it's being dropped from this config?

[detiber]

My only remaining question is just confirming that we don't have anything that cares about kubernetes-sigs-cluster-api.netlify.com, since it's being dropped from this config?

It's configured in the netlify.toml for the release-0.2 branch, which owns that URL (as it is configured as the default branch in Netlify).

[ncdc]

Ok, so it won't be an issue that we're removing it from master, right?

[detiber]

Ok, so it won't be an issue that we're removing it from master, right?

Correct.

[ncdc]

/lgtm

[vincepri]

/hold cancel

[detiber]

@vincepri The DNS config has not been merged yet...

[ncdc]

I think the DNS change is in now?

[detiber]

It is, however I had forgotten that Netlify does not like the use of CNAME records where the dns subdomain used does not match the Netlify URL prefix for the branch. I've created kubernetes/k8s.io#488 to update the DNS records properly and #1848 to re-add the proper redirects.