add a first app

Apps/mycoolapp/app.json

@@ -0,0 +1,15 @@
+{
+  "title": "MyCoolApp",
+  "description": "A cool custom app",
+  "developer": "Me",
+  "image": "linuxserver/jellyfin:latest",
+  "ports": {
+    "8096/tcp": "8096"
+  },
+  "volumes": {
+    "/config": "/mnt/data/jellyfin/config",
+    "/media": "/mnt/media"
+  },
+  "web_ui": "http://[HOST_IP]:[PORT:8096]",
+  "icon": "https://raw.githubusercontent.com/linuxserver/docker-templates/master/linuxserver.io/img/jellyfin-icon.png"
+}