added js runner

Author: abailly

README.md

@@ -2,5 +2,6 @@
 
 ## Content
 
+* http://aws.amazon.com/fr/blogs/compute/running-executables-in-aws-lambda/
 * `ghc-centos`: Docker container for building Haskell binaries compatible with [Amazon's Linux AMI](http://docs.aws.amazon.com/lambda/latest/dg/current-supported-versions.html). Does not seem to be a good idea in general as there are quite a few differences between CentOS and Linux AMI.
 * `run.js`: Javascript wrapper to run binary in a child process

run.js

@@ -14,5 +14,9 @@ main.on('error', (err) => {
 });
 
 main.on('close', (code) => {
+  console.log(`child process pipes closed with code ${code}`);
+});
+
+main.on('exit', (code) => {
   console.log(`child process exited with code ${code}`);
 });