Added webpack support for Node

[Joelith]

Added the ability to use a compiled dist folder script rather than the full code. Reduces overall file size and allows you to have test code that isn't compiled and sent to the server.

Resolves Issue #629

[Joelith]

I should add this code assumes you are compiling to dist/main.js (which is the default). You will need to install webpack (npm install webpack webpack-cli --dev) and then add a webpack.config.js like so:

module.exports = {
  entry: './func.js',
  target: 'node'
};

[Joelith]

Can this be reviewed please. Would love to be able to reduce memory size in our production images on OCI