continue building out request infrastructure

_includes/listings.njk

@@ -1,13 +1,11 @@
-{% set tag = "offers" %}
-
-<div id="listings">
+<div class="listings">
   {% for tag in collections | getKeys | removeCoreTags | sortAlphabetically %}
     <div class="category">
       <div class="category-title">
         <h2>{{ tag }}</h2>
         <p>{{ tag | getTagline }}</p>
       </div>
-      {% set listings = collections[tag] | filterByDate(day) | filterByTag(tag) %}
+      {% set listings = collections[tag] | filterByDate(day) | filterByTag(category) %}
       {% if listings | length == 0 %}
       <p>No listings.</p>
       {% endif %}