add ck editor file upload endpoint

app/controllers/ck_editor_uploads_controller.rb

@@ -0,0 +1,14 @@
+class CkEditorUploadsController < ApplicationController
+  def create
+    @upload = CkEditorUpload.new(attachment: params[:attachment])
+
+    if @upload.save!
+      render(json: {
+        uploaded: true,
+        url: rails_blob_url(@upload.attachment, only_path: false),
+      })
+    else
+      render(json: { uploaded: false })
+    end
+  end
+end

app/models/ck_editor_upload.rb

@@ -0,0 +1,11 @@
+# == Schema Information
+#
+# Table name: ck_editor_uploads
+#
+#  id         :bigint           not null, primary key
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+class CkEditorUpload < ApplicationRecord
+  has_one_attached :attachment
+end