Update README.md with example for serverless invoke local command

Author: mansn

README.md

@@ -1,29 +1,44 @@
 # bmc-aws-lambda-serverless
-The AWS Lambda serverless functions serving the frontend. Setup with AWS API Gateway and AWS DynamoDB.
+
+The AWS Lambda serverless functions serving the frontend. Setup with AWS API
+Gateway and AWS DynamoDB.
 
 The backend for https://github.com/stefanfranzen/business-model-canvas
 
 ## Installation
+
 ```
 npm install
 ```
 
 ## Deploy
+
 ### All lambdas
+
 ```
 serverless deploy
 ```
+
 ### One specific lambda
+
 ```
 serverless deploy --function <lambda name>
 ```
 
 ## Testing
+
 ### Unit tests
+
 ```
 npm test
 ```
+
 ### Local lambda with deployed DynamoDB
+
+```
+serverless invoke local --function create --path mocks/create-event.json
+```
+
 ```
 {
   "body": "{\"content\":\"hello world\",\"attachment\":\"hello.jpg\"}",
@@ -34,7 +49,9 @@ npm test
   }
 }
 ```
+
 ### The deployed backend in AWS of API Gateway, AWS Lambda's and DynamoDB
+
 ```
 npx aws-api-gateway-cli-test \
 --username='<YOUR_USERS_EMAIL>' \