Generates a now.json file for static docker deployments on now that require .env files (which are ignored in .gitignore)

generateNowConfig.js

const path = require('path');
const fs = require('fs');

// Generates now.json
// Writes a now config for static site copying .env to now.json
function main() {
  const baseDir = path.join(__dirname, '../');
  const envFile = fs.readFileSync(path.join(baseDir, '.env'));
  const envLines = envFile.toString().split('\n');
  const nowConfig = {
    public: false,
    type: 'static',
    alias: '<NOW ALIAS>',
    static: {
      rewrites: [
        {
          source: '**',
          destination: '/index.html',
        },
      ],
    },
    env: {},
  };
  envLines.forEach(line => {
    if (line.trim().charAt(0) !== '#') {
      const lineParts = line.trim().split('=');
      nowConfig.env[lineParts[0]] = lineParts[1];
    }
  });
  const fileToWrite = `${baseDir}now.json`;
  fs.writeFileSync(fileToWrite, JSON.stringify(nowConfig, null, 2));
  console.log('Writing now.json file to', fileToWrite, '...');
  process.exit(0);
}

main();