Digest asset file

_includes/head.html

@@ -1,4 +1,4 @@
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
 <link href="https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;0,900;1,300;1,400;1,700;1,900&family=Mulish:ital,wght@0,200..1000;1,200..1000&display=swap" rel="stylesheet">
-<link rel="stylesheet" href="{{ "/assets/stylesheets/application.css" | relative_url }}">
+<link rel="stylesheet" href="{{ "/assets/stylesheets/application.css" | asset_digest }}">

_plugins/asset_digest.rb

@@ -0,0 +1,19 @@
+module Jekyll
+  module AssetDigest
+    def asset_digest(input)
+      site = @context.registers[:site]
+      file_path = site.in_source_dir(input.sub(/^\//, ''))
+
+      if File.exist?(file_path)
+        content = File.read(file_path)
+        hash = Digest::MD5.hexdigest(content)
+        Jekyll.logger.info "AssetDigest", "Generated: #{input} => #{hash}"
+        "#{input}?v=#{hash}"
+      else
+        input
+      end
+    end
+  end
+end
+
+Liquid::Template.register_filter(Jekyll::AssetDigest)