add support for Gotify push notifications

config/notify.config.js

@@ -0,0 +1,16 @@
+// This is the configuration for the Flitter Gotify wrapper service, 'notify'.
+const notify = {
+    // URL to the Gotify host (e.g. https://my-gotify.server.url/)
+    host: env('GOTIFY_HOST'),
+
+    // collection of notification channel groups
+    groups: {
+        // default group. You can specify as many groups as you want.
+        // Each group should be an array of Gotify app keys.
+        default: [
+            env('GOTIFY_DEFAULT_APP_KEY'),
+        ],
+    }
+}
+
+module.exports = exports = notify