Add systemload average to details

spring-boot-admin-server/src/main/webapp/public/views/apps/details.html

@@ -89,6 +89,16 @@
 	  <table class="table">
 	    <thead><tr><th>JVM</th><th><small class="pull-right"><a href="{{ application.url }}/metrics">raw JSON</a></small></th></tr></thead>
 	    <tbody>
+	      <tr ng-if="metrics['systemload.average'] != null && metrics['systemload.average'] >= 0.0">
+	        <td colspan="2">Systemload (last minute average)
+	        	<div class="progress" style="margin-bottom: 0px;">
+	            	<div class="bar" style="width:{{ metrics['systemload.average'] * 100 | number:0 }}%;"
+	               		ng-class="{'bar-success': metrics['systemload.average'] < 0.75, 'bar-warning': metrics['systemload.average'] >= 0.75 && metrics['systemload.average'] < 0.95, 'bar-danger': metrics['systemload.average'] >= 0.95}">
+	              		{{metrics['systemload.average'] * 100 | number:0}}%
+	            	</div>
+	          	</div>
+	        </td>
+	      </tr>
 	      <tr>
 	        <td>Uptime</td>
 	        <td>{{ metrics['uptime'] + ticks | timeInterval }} [d:h:m:s]</td>