Update README.md

Author: alexcheng1982

README.md

@@ -1 +1,18 @@
-# Aliyun Dashscope Spring AI Client
+# Aliyun Dashscope Spring AI Client
+
+Aliyun Dashscope Client for Spring AI
+
+[![build](https://github.com/JavaAIDev/spring-ai-dashscope-client/actions/workflows/build.yaml/badge.svg)](https://github.com/JavaAIDev/spring-ai-dashscope-client/actions/workflows/build.yaml)
+
+![Maven Central Version](https://img.shields.io/maven-central/v/io.github.alexcheng1982/spring-ai-dashscope-client)
+
+
+> A Aliyun Dashscope API key is required. The key is set as environment
+> variable `DASHSCOPE_API_KEY`.
+
+Usage:
+
+```java
+var client = DashscopeChatClient.createDefault();
+var response = client.call("hello");
+```