Use CDN for asset serving

Author: David Farrington

adminlteui/templates/admin/base.html

@@ -12,10 +12,10 @@
     <!-- Tell the browser to be responsive to screen width -->
     <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
     <!-- Bootstrap 3.3.6 -->
-    <link rel="stylesheet" href={% static "admin/bootstrap/css/bootstrap.min.css" %}>
+    <link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
     <!-- Font Awesome -->
     <!--<link rel="stylesheet" href="//cdn.bootcss.com/font-awesome/4.5.0/css/font-awesome.min.css">-->
-    <link rel="stylesheet" href={% static "admin/font-awesome/css/font-awesome.min.css" %}>
+    <link rel="stylesheet" href="//stackpath.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
     <!-- Ionicons -->
     <link rel="stylesheet" href={% static "admin/ionicons/ionicons.min.css" %}>
 

adminlteui/templates/admin/login.html

@@ -17,7 +17,7 @@
     <!-- Tell the browser to be responsive to screen width -->
     <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
     <!-- Bootstrap 3.3.6 -->
-    <link rel="stylesheet" href={% static "admin/bootstrap/css/bootstrap.min.css" %}>
+    <link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
     <!-- Font Awesome -->
     <link rel="stylesheet" href="//cdn.bootcss.com/font-awesome/4.5.0/css/font-awesome.min.css">
     <!-- Ionicons -->

adminlteui/templates/registration/logged_out.html

@@ -17,7 +17,7 @@
     <!-- Tell the browser to be responsive to screen width -->
     <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
     <!-- Bootstrap 3.3.6 -->
-    <link rel="stylesheet" href={% static "admin/bootstrap/css/bootstrap.min.css" %}>
+    <link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
     <!-- Font Awesome -->
     <link rel="stylesheet" href="//cdn.bootcss.com/font-awesome/4.5.0/css/font-awesome.min.css">
     <!-- Ionicons -->