Add JSDoc to server/*

Signed-off-by: Matthew Nickson <mnickson@sidingsmedia.com>

server/prometheus.js

@@ -34,6 +34,9 @@ const monitor_status = new PrometheusClient.Gauge({
 class Prometheus {
     monitorLabelValues = {}
 
+    /**
+     * @param {Object} monitor Monitor object to monitor
+     */
     constructor(monitor) {
         this.monitorLabelValues = {
             monitor_name: monitor.name,
@@ -44,6 +47,11 @@ class Prometheus {
         };
     }
 
+    /**
+     * Update the metrics page
+     * @param {Object} heartbeat Heartbeat details
+     * @param {Object} tlsInfo TLS details
+     */
     update(heartbeat, tlsInfo) {
 
         if (typeof tlsInfo !== "undefined") {