Hari
Installation is pretty simple.
You need to start with registering an account in Algolia.com and obtain the algolia ID and algolia secret for your project.
Then download and install the extension composer require clarkwinkelmann/flarum-ext-scout
Enable the extension in your admin panel and setup with selecting "algolia" and input the ID and secret.
Finally in your server terminal, run php flarum scout:import-all
Your search function will now automagically be routed through Algolia!
Now go to your algolia dashboard and mess with the settings to your liking.