Restore/add a redirect for the domain postmorten pgae

[mcollina]

Where did the domain postmortem was moved to? We should set up a redirect, as other pieces point to it.

Ref: tc39/proposal-async-context#92

[mcollina]

cc @ovflowd

[ovflowd]

I do not recall now. @bmuenzenmeyer do you remember?

[bmuenzenmeyer]

i can go digging - this also don't ring a bell to me - the only post-mortem I was aware of was https://nodejs.org/en/blog/announcements/node-js-march-17-incident

[bmuenzenmeyer]

it was deleted as part of #4991 - probably just a mistake. i can create a PR to re-add with a redirect

how i found out

``` git log --diff-filter=D -- locale/en/docs/guides/domain-postmortem.md ```

thanks chat gpt

[ovflowd]

Ah that postmortem? No it was deleted way later. On that PR it got moved to a different folder.

Still trying to remember, but I believe because it was a really old post mortem inside the guides folder and it didn't make sense to be kept as it was not a guide.

We could bring it back as a blog post, as that makes more sense.

[mcollina]

The fundamental part is that:

1. the content is restored somewhere
2. a redirect is put in place

[bmuenzenmeyer]

working on it now - i found the original inclusion into nodejs/node so we can backdate it