DOC-868: Added note re for troubleshooting missing referer (#2066)

* DOC-868: Added note re for troubleshooting missing referer

Also updated the nixpin and tweaked some bash scripts to allow them to run
in nix.

* Update cloud-deployment-guide/editor-and-features.md

Co-authored-by: Tyler Kelly <tyler.kelly@tiny.cloud>

Co-authored-by: Tyler Kelly <tyler.kelly@tiny.cloud>

_scripts/init.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 

_scripts/serve.sh

@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 rm -rf _site
 bundle exec jekyll serve --incremental --config _config.yml,_config-local.yml,_config-local-override.yml --host=0.0.0.0

cloud-deployment-guide/editor-and-features.md

@@ -31,6 +31,12 @@ The following example adds a script tag into the application that inserts the co
 
 ![Script Tag Description]({{ site.baseurl }}/images/scripttag.png)
 
+<a class="anchor" id="referer-troubleshooting"></a>
+
+> **Important**: {{site.cloudname}} verifies the domain {{site.productname}} is loading from by checking the **Referer** header in the network request. Sometimes the domains in the **Referer** header does not match with the URL in the browser's address bar.  
+>
+> To check the **Referer** header, open your browser's _Developer's Tools_ and open the _Network_ tab. From there, find the request being made to load {{site.productname}} with your API key, and click on the **Headers** tab.  In the section called **Request Headers** there should be a field for **Referer**. If the value there is different from one of your registered URLs, you may need to adjust either your registered URLs, or your application's **Refer** header settings.
+
 ### Step 2: Load, customize and interact with TinyMCE
 
 There are more than 40 open source plugins that enhance the editing experience in addition to the advanced content create solutions on {{site.cloudname}}. A range of [simple examples]({{ site.baseurl }}/demo/basic-example/) are available. Refer to the [Quick start]({{ site.baseurl }}/quick-start) section for more information.

nixpin.nix

@@ -1,5 +1,5 @@
 import (fetchTarball {
-    url = "https://github.com/NixOS/nixpkgs-channels/archive/696c6bed4e8e2d9fd9b956dea7e5d49531e9d13f.tar.gz";
+    url = "https://github.com/NixOS/nixpkgs/archive/7e9b0dff974c89e070da1ad85713ff3c20b0ca97.tar.gz";
     # Wait till new nix version is released.
     #sha256 = "1b4h12y45h08c7dxa6420qmspv6k82p3sw4xzz8g53k7s7dg128z";
   }

shell.nix

@@ -10,6 +10,7 @@ let
     buildInputs = [
       nixpkgs.ruby
       nixpkgs.zlib
+      nixpkgs.bundler
     ];
   };
 in ui