Update server.js

Author: tysonrm

src/server.js

@@ -145,8 +145,8 @@ exports.start = async function (app) {
  // call service to acquire or renew x509 certificate from PKI
  const { key, cert } = await CertificateService.provisionCert(domain)
 
- fs.writeFileSync(certFile, cert, 'utf-8')
- fs.writeFileSync(keyFile, key, 'utf-8')
+ await fs.writeFile(certFile, cert, 'utf-8')
+ await fs.writeFile(keyFile, key, 'utf-8')
 
  return { key, cert }
  }