htaccess
On top of Kirby CMS default content in .htaccess file there are few things we added.

Security option for Apache server

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Options -Indexes
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Kirby 3 Fingerprint plugin

And code needed for Kirby 3 Fingerprint plugin to work
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# Fingerprint plugin
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RewriteCond %{REQUEST_FILENAME} !-f
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RewriteRule ^(.+)\.([0-9a-z]{32})\.(js|css)$ $1.$3 [L]
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Browser caching

We didn't add and code for Browser caching, but for your production .htaccess it would probably be wise to add.
Resources you can look into for this:
But be careful, you should know what you are doing.