Add examples

[chrisdmacrae]

Problem's to be solved

I'd like to see some examples for generating indexes for various tools/services. Some examples:

Static Site Generators

• Hugo
• Jekyll
• GatsbyJS

API-driven CMS'

• Contentful
• DatoCMS
  ...

[Haroenv]

Would like to use this in gatsby-plugin-algolia, but not exactly sure how to save the output, if Gatsby has some kind of cache for this, or if I should just save a JSON when indexing 🤔

[dguo]

I learned about atomic-algolia because I followed this guide for Hugo.