add online demo url

README.md

@@ -8,6 +8,8 @@
 ## Introduction
 ezBookkeeping is a lightweight personal bookkeeping app hosted by yourself. It can be deployed on almost all platforms, including Windows, macOS and Linux on x86, amd64 and ARM architectures. You can even deploy it on an raspberry device. It also supports many different databases, including sqlite and mysql. With docker, you can just deploy it via one command without complicated configuration.
 
+Online Demo: [https://ezbookkeeping-demo.mayswind.net](https://ezbookkeeping-demo.mayswind.net)
+
 ## Features
 1. Open source & Self-hosted
 2. Lightweight & Fast