support algolia search service for website #226

Actual Behaviour

Hi, we are using Docusaurus[1] to build our website and added our projects' documentation these days. Due to help users to find docs more quickly, we could use the algolia[1] service here.

Here[3] is its usage, just for reference.

[1] https://v2.docusaurus.io/
[2] http://algolia.com/
[3] https://v2.docusaurus.io/docs/search#using-algolia-docsearch