Revamp build environment

[Rokt33r]

• Upgrade webpack
• Should be compiled on LTS version of node.
• Upgrade React
• Discard grunt

[AWolf81]

Maybe we can have a look at the Webpack setup from Guppy where I'm also collaborating.

I haven't created the complete setup there (just added the auto update feature) but I can summarize some insights of the Setup:

• Auto-update with Git releases supported (No info that autoupdating during dev server is disabled - I've seen that here)
• Mac copy app to application folder if it is not already running from there
• Cross-platfrom bundles with Electron builder & Webpack for Mac, Linux & Windows
• No Code-signing with CI setup yet (unsigned binaries right now)
• DevServer is serving a bundled javascript file (no manually including of scripts required - just bundle.js) and uses localhost instead of an html during development.
• No minification for production builds (but definitely somthing that we could add if req.)
• Project based on Create-react-app (so every Babel/JSX feature transpiled to latest Chrome version)

I'm no Webpack configuration expert but if you like I could give it a try.

• Does BoostIO need anything special that I have missed in the list above?
• With LTS you mean current Node 10.15.3 LTS version, right? This version must be used for bundling?

I think we could also upgrade Electron to version 5.0.0 if it's not already done.