chore: add Uffizzi demo button in README (#3032)

README.md

@@ -42,12 +42,18 @@ Boringly, we call it "[customer identity access management](https://en.wikipedia
 - Visit our 🎨 [website](https://logto.io) for a brief introduction if you are new to Logto.
 - A step-by-step guide is available on 📖 [docs.logto.io](https://docs.logto.io).
 
+### Interactive demo
+
+[![Uffizzi](https://cdn.uffizzi.com/demo-button.svg)](https://app.uffizzi.com/demo/github.com/logto-io/logto)
+
+Recommended. Click and wait for a few seconds to start exploring Logto in your own browser!
+
+[![GitPod](https://raw.githubusercontent.com/gitpod-io/gitpod/30da76375c996109f243491b23e47feefab7217f/components/dashboard/public/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/logto-io/demo)
+
+If you launch Logto via GitPod, please wait until you see the message like `App is running at https://3001-...gitpod.io` in the terminal, press Cmd (or Ctrl on Windows) and click the URL to continue your Logto journey.
+
 ### Launch Logto
 
-#### Online demo (GitPod)
-
-[Click here](https://gitpod.io/#https://github.com/logto-io/demo) to launch Logto via GitPod. Once you see the message like `App is running at https://3001-...gitpod.io` in the terminal, press Cmd (or Ctrl) and click the URL to continue your Logto journey.
-
 #### Docker Compose
 
 Docker Compose CLI usually comes with [Docker Desktop](https://www.docker.com/products/docker-desktop).

docker-compose.demo.uffizzi.yml

@@ -0,0 +1,37 @@
+# This compose file is for demonstration only, do not use in prod.
+version: "3.9"
+
+x-uffizzi:
+  ingress:
+    service: app
+    port: 3001
+
+services:
+  app:
+    depends_on:
+      - "postgres"
+    image: registry.uffizzi.com/logto-io/logto:prerelease
+    ports:
+      - 3001:3001
+    environment:
+      TRUST_PROXY_HEADER: 1
+      DB_URL: postgres://postgres:p0stgr3s@localhost:5432/logto
+    deploy:
+      resources:
+        limits:
+          memory: 2000M
+    entrypoint: /bin/sh
+    command:
+      - "-c"
+      - "npm run cli db seed -- --swe && ENDPOINT=$$UFFIZZI_URL npm start"
+
+  postgres:
+    image: postgres:14-alpine
+    user: postgres
+    environment:
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "p0stgr3s"
+    deploy:
+      resources:
+        limits:
+          memory: 500M