Fix send email

[davidtran]

export default function generateEmailTemplate({ fileName, data }) {
  const templatePath = `${path.resolve()}/email-template/${fileName}`;
  const template = execSync(`mjml ${templatePath}`).toString();
  return handlebars.compile(template)(data).toString();
}

• please use mjml npm package to compile email
• never use NodeJS sync method. It hurts app performance. Use async/await or Promise instead.