Use House for MD comments

app/controllers/action_text/markdown/uploads_controller.rb

@@ -0,0 +1,16 @@
+class ActionText::Markdown::UploadsController < ApplicationController
+  include ActiveStorage::SetCurrent
+
+  def create
+    file = params[:file]
+    blob = ActiveStorage::Blob.create_and_upload! io: file, filename: file.original_filename, content_type: file.content_type
+    @upload = Current.account.uploads_attachments.create! blob: blob
+    render :create, status: :created, formats: :json
+  end
+
+  def show
+    @attachment = ActiveStorage::Attachment.find_by! slug: "#{params[:slug]}.#{params[:format]}"
+    expires_in 1.year, public: true
+    redirect_to @attachment.url
+  end
+end