Adding a default 404 page with its translations

Modules/Translation/Resources/lang/core/en/core.php

@@ -62,4 +62,7 @@ return [
     'create resource' => 'Create :name',
     'edit resource' => 'Edit :name',
     'destroy resource' => 'Delete :name',
+    'error 404' => '404',
+    'error 404 title' => 'Oops! This page was not found.',
+    'error 404 description' => 'The page you are looking for was not found.',
 ];

Themes/Adminlte/views/errors/404.blade.php

+@extends('layouts.master')
+
+@section('content-header')
+    <h1>
+        {{ trans('core::core.error 404') }}
+    </h1>
+    <ol class="breadcrumb">
+        <li><a href="{{ route('dashboard.index') }}"><i class="fa fa-dashboard"></i> {{ trans('core::core.breadcrumb.home') }}</a></li>
+        <li class="current">{{ trans('core::core.error 404') }}</li>
+    </ol>
+@stop
+
+@section('content')
+    <div class="error-page">
+        <h2 class="headline text-yellow" style="line-height: 0.6; margin-top: 0;"> 404</h2>
+        <div class="error-content">
+            <h3><i class="fa fa-warning text-yellow"></i> {{ trans('core::core.error 404 title') }}</h3>
+            <p>{!! trans('core::core.error 404 description') !!}</p>
+        </div>
+        <!-- /.error-content -->
+    </div>
+@stop