fix tracking

- change app.locals to res.locals because Do not track is a per-request setting
- change false to False because Nunjucks uses Python-style syntax and doesn't understand false

docs/views/layout.html

@@ -24,14 +24,14 @@
 
 {% block head %}
   {% include "includes/head.html" %}
-  {% if doNotTrackEnabled == false and promoMode == 'true' and gtmId %}
+  {% if doNotTrackEnabled == False and promoMode == 'true' and gtmId %}
     {% include "includes/tracking_head.html" %}
   {% endif %}
 {% endblock %}
 
 
 {% block bodyStart %}
-  {% if doNotTrackEnabled == false and promoMode == 'true' and gtmId %}
+  {% if doNotTrackEnabled == False and promoMode == 'true' and gtmId %}
     {% include "includes/tracking_body.html" %}
   {% endif %}
 {% endblock %}

server.js

@@ -128,7 +128,7 @@ app.use(bodyParser.urlencoded({
 // Therefore we can avoid injecting third-party scripts that do not respect this decision.
 app.use(function (req, res, next) {
   // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/DNT
-  app.locals.doNotTrackEnabled = (req.header('DNT') === '1')
+  res.locals.doNotTrackEnabled = (req.header('DNT') === '1')
   next()
 })