fix name method page_not_found

app/controllers/error_controller.rb

@@ -2,7 +2,7 @@
 
 # Controller error
 class ErrorController < ApplicationController
-  def file_not_found; end
+  def page_not_found; end
 
   def internal_server_error; end
 end

app/views/error/internal_server_error.html.erb

+<% provide(:title, 'Internal Server Error') %>
 <div class="box_content_404">
   <div class="container">
     <div class="col-lg-12">

app/views/error/file_not_found.html.erb → app/views/error/page_not_found.html.erb

+<% provide(:title, 'Page Not Found') %>
 <div class="box_content_404">
   <div class="container">
     <div class="col-lg-12">

config/routes.rb

@@ -9,6 +9,6 @@ Rails.application.routes.draw do
   get 'jobs/:model/:slug', to: 'job#index', as: :jobs
 
   # Rails error
-  match '/404', to: 'error#file_not_found', via: :all
+  match '/404', to: 'error#page_not_found', via: :all
   match '/500', to: 'error#internal_server_error', via: :all
 end