Merge remote-tracking branch 'origin_kuma/master'

# Conflicts:
#	package-lock.json
#	server/database.js
#	server/model/monitor.js
#	server/routers/api-router.js
#	server/server.js
#	src/components/MonitorList.vue
#	src/components/PingChart.vue
#	src/icon.js
#	src/pages/DashboardHome.vue
#	src/pages/StatusPage.vue
#	src/router.js
#	src/util.js

server/model/heartbeat.js

@@ -14,6 +14,11 @@ const { BeanModel } = require("redbean-node/dist/bean-model");
  */
 class Heartbeat extends BeanModel {
 
+    /**
+     * Return an object that ready to parse to JSON for public
+     * Only show necessary data to public
+     * @returns {Object}
+     */
     toPublicJSON() {
         return {
             status: this.status,
@@ -23,6 +28,10 @@ class Heartbeat extends BeanModel {
         };
     }
 
+    /**
+     * Return an object that ready to parse to JSON
+     * @returns {Object}
+     */
     toJSON() {
         return {
             monitorID: this.monitor_id,