Added live-reload fix to build/dev-server.js
Added live-reload fix to build/dev-server.js

- To fix live reloading added a block of code (src: https://stackoverflow.com/questions/41685966/why-does-livereload-not-work-in-vue-cli-project-with-vagrant)

gaspoweredkiwi/tab-tracker,gaspoweredkiwi/tab-tracker