add uduapp.json manifest for the udu harness

uduapp.json

@@ -0,0 +1,16 @@
+{
+  "format": "uduapp/0.1",
+  "id": "memos",
+  "name": "Memos",
+  "version": "0.24.0",
+  "source": { "owner": "system", "repo": "memos" },
+  "build": {
+    "dockerfile": "Dockerfile",
+    "port": 5230
+  },
+  "data": {
+    "dir": "/var/opt/memos",
+    "snapshotKeep": 3
+  },
+  "launcher": { "name": "Memos" }
+}