start to work in requests by cleaning up listing code

_includes/listings.njk

@@ -1,3 +1,5 @@
+{% set tag = "offers" %}
+
 <div id="listings">
   {% for tag in collections | getKeys | removeCoreTags | sortAlphabetically %}
     <div class="category">
@@ -5,10 +7,11 @@
         <h2>{{ tag }}</h2>
         <p>{{ tag | getTagline }}</p>
       </div>
-      {% if collections[tag] | filterByDate(today) | length == 0 %}
+      {% set listings = collections[tag] | filterByDate(day) | filterByTag(tag) %}
+      {% if listings | length == 0 %}
       <p>No listings.</p>
       {% endif %}
-      {% for listing in collections[tag] | filterByDate(today) | sortAlphabeticallyByTitle %}
+      {% for listing in listings | sortAlphabeticallyByTitle %}
         {% include "listing.njk" %}
       {% endfor %}
     </div>