add bottom padding to main,

improve error handling with request function

index.html

@@ -56,7 +56,7 @@
 			</nav>
 		</header>
 		<main>
-			<section class="w3-container">
+			<section>
 				<h2>Instances</h2>
 				<div class="w3-card w3-padding">
 					<div class="flex row nowrap" style="margin-top: 1em; justify-content: space-between;">