Update Nodejs example to forward CMD arguments

The nodejs example doesn't seem to work as given. Shouldn't it forward the handler argument from CMD as with the Python example?

Author: nickcox

doc_source/images-test.md

@@ -82,9 +82,9 @@ You can build RIE into a base image\. Download the RIE from GitHub to your local
    ```
    #!/bin/sh
    if [ -z "${AWS_LAMBDA_RUNTIME_API}" ]; then
-     exec /usr/local/bin/aws-lambda-rie /usr/bin/npx aws-lambda-ric
+     exec /usr/local/bin/aws-lambda-rie /usr/bin/npx aws-lambda-ric $@
    else
-     exec /usr/bin/npx aws-lambda-ric
+     exec /usr/bin/npx aws-lambda-ric $@
    fi
    ```
 
@@ -144,4 +144,4 @@ You install the runtime interface emulator to your local machine\. When you run
    curl -XPOST "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{}'
    ```
 
-   This command invokes the function running in the container image and returns a response\.
+   This command invokes the function running in the container image and returns a response\.