add border to map, improve spacing

content/publishers/_index.html

@@ -1,6 +1,8 @@
 ---
 draft: false
 ---
+<h1>Lumbung of Publishers</h1>
+
 <article class="map">
   {{< map geoJson="data/geojsonContributors.json">}}
 </article>

themes/lumbung-theme/static/css/main.css

@@ -1795,7 +1795,8 @@ Styles for publishers page
 ================================================= */
 
 .publishers-page .map {
-    margin-bottom: 2em;
+    margin-block: 2rem 4rem;
+    border: 1px solid;
 }
 
 .card.publishers {