README usage updates

Fix startup messaging not including all endpoints

Author: rdbatch

Diff for: README.md

@@ -3,7 +3,7 @@ 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
+## Running
 
 This utility is published as both a jar or Docker image.
 
@@ -34,4 +34,24 @@ Run on alternate port
 
 ```bash
 docker run -p 8080:8080 -e RUNTIME_PORT=8080 c1phr/aws-lambda-runtime-local
-```
+```
+
+## Usage
+
+This utility will expose endpoints that mirror the AWS Lambda Runtime interface:
+
+```text
+GET http://localhost:9000/2018-06-01/runtime/invocation/next
+POST http://localhost:9000/2018-06-01/runtime/invocation/$REQUEST_ID/response
+POST http://localhost:9000/2018-06-01/runtime/invocation/$REQUEST_ID/error
+POST http://localhost:9000/2018-06-01/runtime/init/error
+```
+
+In addition to an endpoint that allows you to stage request events for your runtime to invoke:
+
+```text
+POST http://localhost:9000/events/next
+```
+
+The runtime will serve events that have been POSTed to the `/events/next` endpoint sequentially each time the `/invocation/next` endpoint is called (or will return an empty response when there is no pending event). 
+Invocation requests will include headers to emulate the Lambda Runtime interface as well, and expects that Request IDs are included with calls to `/response` and `/error` just as the Lambda service would.

Diff for: src/main/kotlin/com/batchofcode/runtimelocal/handler/RootHandler.kt

@@ -16,7 +16,8 @@ fun main() {
     println("Started Lambda Runtime Local on Port $port")
     println("Available Lambda Runtime Endpoints ------------------------------------------------")
     println("GET invocations - http://localhost:$port/2018-06-01/runtime/invocation/next")
-    println("POST invocation error - http://localhost:$port/2018-06-01/runtime/invocation/error")
+    println("POST invocation response - http://localhost:$port/2018-06-01/runtime/invocation/\$REQUEST_ID/response")
+    println("POST invocation error - http://localhost:$port/2018-06-01/runtime/invocation/\$REQUEST_ID/error")
     println("POST init error - http://localhost:$port/2018-06-01/runtime/init/error")
     println("-----------------------------------------------------------------------------------")
     println("Helper Endpoints:")