Parses a Node.js app's package.json file to figure out which node version and commands to use.
Internal tool to extract information about a Node.js application.
ey_node_app_info engine-version --app /path/to/app
# output like '0.8.7'
ey_node_app_info command start --app /path/to/app
# output like 'node ./app.js' or 'npm start'