Automate search index updating process

[davidcheung]

Right now my process to update the index is manual, our configuration in docusaurus targets an index
then this Index is manually updated by me using algolia/docsearch-scraper that crawls each page with a config

To automate this my thoughts would be to stick with 1 index
and have a github action that runs on schedule, maybe with another manual dispatch option that runs this docker-image with API_KEY in repository's secret (separate from the normal deployment pipeline could be fine)

Talk to @davidcheung for credentials,
probably want to create a new account under shared 1password to gen the api key from algolia