feat: update readme to include k6 details

Author: alichherawalla

README.md

@@ -78,7 +78,12 @@ A basic starter for a web app with node, express and mongoose -->
     - Support for batch jobs in multi-container environment
     - Support for circuit breakers
     - Autogenerated swagger documentation
+    - Load testing using k6
 
+## Running Load tests
+
+- [Install](https://k6.io/docs/getting-started/installation/) k6
+- Execute the following command: `k6 run __tests__/__load__/script.js`
 ## Build and run docker container locally
 
     - docker-compose down