ci(circleci): setup deploy-docs job

[Lee-W]

Close: #122

I think the last step we need is

Now, we need to upload the public key to GitHub so that it knows to trust a connection from CircleCI initiated with our private key. We head to https://github.com/jklukas/docs-on-gh-pages/settings/keys > Add Deploy Key, make the title of it “CircleCI write key” and paste in the contents of docs_deploy_key_rsa.pub. If you haven’t already deleted the private key, be extra careful you’re not accidentally copying from docs_deploy_key_rsa!

which might need @sunank200 's help on setting this up. (Scheduled messages with info and instructions for this setup on Slack)

ref: https://circleci.com/blog/deploying-documentation-to-github-pages-with-continuous-integration/

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	7ca054b
Status:	✅  Deploy successful!
Preview URL:	https://fc479ce5.ask-astro.pages.dev
Branch Preview URL:	https://setup-gh-pages-deploy.ask-astro.pages.dev

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[Lee-W]

https://astronomer.github.io/ask-astro/

it's here

[sunank200]

LGTM.

But let's make sure that airflow docs are visible first as part of this PR: #131 before merging this.

[sunank200]

This is still not visible correctly @Lee-W ?

[Lee-W]

This is still not visible correctly @Lee-W ?

This branch only do the github actions part. not the documentation update. that's done in #131

[Lee-W]

just rebased. once this is merged, the doc will be updated