I just love Netlify; they always have something interesting. I found this extension for adding search to your site. You can use it either client-side or server-side. It’s a step you can add to the build that indexes your pages into a JSON file.
For a client-side implementation, you need to ship the file to the client, probably not optimal. Note: there are several client-side tools out there that have more features.
For a server-side implementation, Netlify will spin up a lambda function for you. Granted, this is probably not a production-ready solution but the concept is perfect for many uses cases.
Tell Netlify you want it to index your site and create a function by adding this to
package = 'netlify-plugin-search-index'
generatedFunctionName = 'mySearchFunction'
publishDirJSONFileName = 'null'
That’s it! You can now use a URL like this to search your site.