docs: Add readme examples

README.md

@@ -8,13 +8,28 @@ A CDK library containing EC2 security group related [CDK Aspects](https://docs.a
   - Disallow public access to AWS Restricted Common ports ([per the AWS Config rule](https://docs.aws.amazon.com/config/latest/developerguide/restricted-common-ports.html))
   - Disallow public access to SSH or RDP per CIS Benchmark guidelines and general good practice
 - Create any other aspect using the base security group aspect class.
+- By default aspects generate errors in the CDK metadata which the deployment or synth process will find, but this can be changed with the `annotationType` property
 
 ## API Doc
 See [API](API.md)
 
 ## Examples
 ### Typescript
 ```
-// Add the aspect to your stack
+// Add an existing aspect to your stack
 Aspects.of(stack).add(new NoPublicIngressAspect());
+
+// Add a custom aspect to your stack
+Aspects.of(stack).add(new SecurityGroupAspectBase({
+  annotationText: 'This is a custom message warning you how you should not do what you are doing.',
+  annotationType: AnnotationType.WARNING,
+  ports: [5985],
+  restrictedCidrs: ['10.1.0.0/16'],
+}));
+
+// Change an existing aspects message and type
+Aspects.of(stack).add(new NoPublicIngressAspect(
+  annotationText: 'This is custom text.',
+  annotationType: AnnotationType.WARNING
+));
 ```