Port asset pipeline to Hanami

Procfile.dev

@@ -1,2 +1,3 @@
 web: bundle exec hanami server
-css: npx tailwindcss -i ./app/assets/index.css -o ./public/assets/index.css --watch
+tailwind: bundle exec rake tailwind:watch
+assets: bundle exec hanami assets watch

Rakefile

@@ -52,3 +52,13 @@ namespace :blog do
     end
   end
 end
+
+namespace :tailwind do
+  task :watch do
+    system("npx tailwindcss -i ./app/assets/css/tailwind.css -o ./app/assets/builds/tailwind.css --watch")
+  end
+
+  task :build do
+    system("npx tailwindcss -i ./app/assets/css/tailwind.css -o ./app/assets/builds/tailwind.css --minify")
+  end
+end