Add optional title to apprise notification

server/notification-providers/apprise.js

@@ -1,12 +1,23 @@
 const NotificationProvider = require("./notification-provider");
 const childProcess = require("child_process");
 
+/**
+ * If you use an apprise backend that requires the notification title to
+ * be set (such as for example messaging a Zulip Stream), you can use this
+ * environment variable to configure the title.
+ */
+const { APPRISE_NOTIFICATION_TITLE } = process.env;
+
 class Apprise extends NotificationProvider {
 
     name = "apprise";
 
     async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
         let args = [ "-vv", "-b", msg, notification.appriseURL ];
+        if (APPRISE_NOTIFICATION_TITLE) {
+            args.push("-t");
+            args.push(APPRISE_NOTIFICATION_TITLE);
+        }
         let s = childProcess.spawnSync("apprise", args);
 
         let output = (s.stdout) ? s.stdout.toString() : "ERROR: maybe apprise not found";