WIP Add Webhooks controller, allowed IP config

app/controllers/webhooks_controller.rb

@@ -0,0 +1,23 @@
+class WebhooksController < ApplicationController
+  skip_forgery_protection
+
+  before_action :authorize_request
+
+  def lndhub
+    begin
+      payload = JSON.parse(request.body.read, symbolize_names: true)
+    rescue
+      head :unprocessable_entity and return
+    end
+
+    head :ok
+  end
+
+  private
+
+  def authorize_request
+    if !ENV['WEBHOOKS_ALLOWED_IPS'].split(',').include?(request.remote_ip)
+      head :forbidden and return
+    end
+  end
+end