aio: Update getting started deployment instructions

[StephenFluin]

NOTE!
This is intended to be merged after #29651 is updated and merged.

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit

PR Type

What kind of change does this PR introduce?

• Documentation content changes

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of all the commit author(s), set the cla label to yes (if enabled on your project), and then merge this pull request when appropriate.

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[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[mary-poppins]

You can preview ff49016 at https://pr30465-ff49016.ngbuilds.io/.
You can preview 6b1e2f4 at https://pr30465-6b1e2f4.ngbuilds.io/.

[mary-poppins]

You can preview eb6a6fc at https://pr30465-eb6a6fc.ngbuilds.io/.

feedback addressed

[mary-poppins]

You can preview c20d714 at https://pr30465-c20d714.ngbuilds.io/.

[brandonroberts]

Caretaker note: Codefresh build failure is unrelated.

[Splaktar]

LGTM.

I posted some details about how to improve this and include a production deployment after talking to the Stackblitz team at ng-conf. You can find those details in #docs on Slack.

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