Remove robots.txt and update layout.ejs

Author: rachaelshaw

views/layouts/layout.ejs

@@ -6,11 +6,22 @@
     <% /* Viewport tag for sensible mobile support */ %>
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
 
-    <% /* Script tags should normally be included further down the page- but scripts
-    that load fonts are a special exception to the rule.  (We include them up here
-    above the «body» to prevent the page flickering when fonts load.)  */ %>
-    <!-- Font Awesome -->
-    <script src="https://use.fontawesome.com/96cbd61ead.js"></script>
+    <% /* Script tags should normally be included further down the page- but any
+    scripts that load fonts (e.g. Fontawesome ≥v5) are special exceptions to the
+    rule. (Include them up here along with any hard-coded «link» tags for Typekit,
+    Google Fonts, etc. - above the «body» to prevent the page flickering when fonts
+    load.) */ %>
+
+    <% /* Certain scripts, normally analytics tools like Google Tag Manager and
+    Google Analytics, should only be included in production: */
+    if (sails.config.environment === 'production') { %>
+    <!-- Google Analytics, Google Tag Manager, etc. -->
+    <% }
+    /* Otherwise, any such scripts are excluded, and we instead inject a
+    robots/noindex meta tag to help prevent any unwanted visits from search engines. */
+    else { %>
+    <meta name="robots" content="noindex">
+    <% } %>
 
     <% /*
         Stylesheets