README usage updates [skip ci]

Author: rdbatch

README.md

@@ -1,4 +1,37 @@
-# aws-lambda-runtime-local [ ![](https://img.shields.io/circleci/project/github/rdbatch02/lambda-runtime-kotlin-native/master.svg?style=flat) ](https://circleci.com/gh/rdbatch02/aws-lambda-runtime-local)
+# AWS Lambda Custom Runtime Local API [ ![](https://img.shields.io/circleci/project/github/rdbatch02/lambda-runtime-kotlin-native/master.svg?style=flat) ](https://circleci.com/gh/rdbatch02/aws-lambda-runtime-local)
 AWS Lambda Runtime API for local testing of custom runtimes
 
 This project runs an HTTP API that is intended to emulate the [AWS Lambda Runtime Interface](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-api.html) to enable local testing of custom runtimes.
+
+## Usage
+
+This utility is published as both a jar or Docker image.
+
+### Jar
+Prerequisites:
+* JRE/JDK 11
+
+Grab the [latest release](https://github.com/rdbatch02/aws-lambda-runtime-local/releases) and run:
+ 
+ ```bash
+ java -jar aws-lambda-runtime-local-<version>.jar
+```
+
+Run on alternate port
+
+ ```bash
+ java -jar -Druntime.port=8080 aws-lambda-runtime-local-<version>.jar
+```
+ 
+ ### Docker
+ Dockerhub Link: [https://hub.docker.com/r/c1phr/aws-lambda-runtime-local](https://hub.docker.com/r/c1phr/aws-lambda-runtime-local)
+ 
+ ```bash
+docker run -p 9000:9000 c1phr/aws-lambda-runtime-local -p
+```
+
+Run on alternate port
+
+```bash
+docker run -p 8080:8080 -e RUNTIME_PORT=8080 c1phr/aws-lambda-runtime-local
+```