Implemented phase 4 for the POC prototype in the Website service.

Services/Website/Resources/Static/css/listing.css

@@ -21,6 +21,13 @@
   box-shadow: var(--shadow-cover);
 }
 
+.listing__photos {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: var(--space-3);
+  padding-top: var(--space-4);
+}
+
 .listing__main {
   display: flex;
   flex: 1 1 auto;