fix instance overflow scroll

scss/index.scss

@@ -20,6 +20,10 @@ body {
         padding: 2px;
     }
 }
+.node-list {
+    overflow-y: scroll;
+    max-height: 360px;
+}
 h1, h2, h3 {
     margin: 4px 0px;
 }

templates/index.rs.html

@@ -53,9 +53,9 @@ templates::{info_html, instance_html, statics::index_css},
                 <span>
                     <h2>Connected Instances</h2>
                     <span class="subtitle">Currently, we're sitting at <i>@nodes.len()</i> members!</span>
-                <span>
+                </span>
             </div>
-            <section>
+            <section class="node-list">
                 <ul>
                     @for node in nodes {
                         @if let Some(inst) = node.instance.as_ref() {