Simple test cases for node debuggers based on 'hello world'.

npm install && npm run build to run webpack build which creates sourcemaps

• npm start - execute index.js without a debugger
• npm run debug - debug with https://nodejs.org/api/debugger.html
• npm run chrome - debug with chrome - https://medium.com/@paul_irish/debugging-node-js-nightlies-with-chrome-devtools-7c4a1b95ae27
• npm run chrome:webpack - same as above but runs webpack build output
• npm run node-inspector - debug with https://github.com/node-inspector/node-inspector
• npm run devtool - debug with https://github.com/Jam3/devtool
• npm run iron-node - debug with https://github.com/s-a/iron-node
• npm run vscode - opens https://code.visualstudio.com/ with config for debugging
• npm run webstorm - opens https://www.jetbrains.com/webstorm/ with config for debugging