Refactor app in to its own slice

slices/main/actions/pages/show.rb

@@ -0,0 +1,16 @@
+module Main
+  module Actions
+    module Pages
+      class Show < Action
+        include Deps["views.pages.show"]
+
+        def handle(req, res)
+          slug = req.params[:slug]
+
+          res.status = File.exist?("slices/main/content/pages/#{slug}.md") ? 200 : 404
+          res.render show, slug: slug
+        end
+      end
+    end
+  end
+end