docs: updated README

Author: anveshdzangolab

packages/errorHandler/README.md

@@ -1,10 +1,11 @@
 # @prefabs.tech/fastify-error-handler
 
-A [Fastify](https://github.com/fastify/fastify) plugin that defines an opinionated config for an API.
+A [Fastify](https://github.com/fastify/fastify) plugin that provides an easy integration of error handler in fastify API.
 
 ## Requirements
 
 * [@prefabs.tech/fastify-config](../config/)
+* [@fastify/sensible](https://github.com/fastify/fastify-sensible)
 
 ## Installation
 
@@ -21,3 +22,31 @@ pnpm add --filter "@scope/project @prefabs.tech/fastify-error-handler
 ```
 
 ## Usage
+
+### Register Plugin
+
+Register @prefabs.tech/fastify-error-handler package with your Fastify instance:
+
+```typescript
+import errorHandlerPlugin from "@prefabs.tech/fastify-error-handler";
+import Fastify from "fastify";
+
+import config from "./config";
+
+const start = async () => {
+  // Create fastify instance
+  const fastify = Fastify({
+    logger: config.logger,
+  });
+  
+  // Register fastify-error-handler plugin
+  await fastify.register(errorHandlerPlugin);
+  
+  await fastify.listen({
+    port: config.port,
+    host: "0.0.0.0",
+  });
+};
+
+start();
+```