Build fails with node v12

[ajithranka]

When using node v12.x, the build fails with the following error

  ERROR in Template execution failed: ReferenceError: process is not defined

  ERROR in   ReferenceError: process is not defined

    - index.ejs:11 eval
      [.]/[html-webpack-plugin]/lib/loader.js!./src/index.ejs:11:2

    - index.ejs:16 module.exports
      [.]/[html-webpack-plugin]/lib/loader.js!./src/index.ejs:16:3

    - index.js:284
      [newfang_bastion]/[html-webpack-plugin]/index.js:284:18

    - task_queues.js:93 processTicksAndRejections
      internal/process/task_queues.js:93:5

As a temporary fix, downgrading the node version and reinstalling the node modules solves the issue.

$ nvm use v10
$ rm -rf node_modules
$ npm install
$ npm run build

There's a related thread on electron-vue.