add emails for newsletter

app/controllers/email_controller.rb

@@ -0,0 +1,15 @@
+class EmailController < ApplicationController
+  skip_before_action :verify_authenticity_token
+  def index
+  end
+
+  def create
+    @email = Email.create(message_params)
+    render json: {}, status: :created
+  end
+
+  private
+  def message_params
+    params.permit(:email)
+  end
+end