Invalid configuration from cryton frontend role

When executing cryton-frondend role, invalid configuration is applied. Right now, it leads to this configuration:

src/environments/environment.prod.ts:

export const environment = {
  production: true,
  refreshDelay: '300',
  useHttps: 'False',
  crytonRESTApiHost: 'localhost',
  crytonRESTApiPort: '8000',
};

Which is bad, as it stringifies the numbers and bools. As a result, it can't be compiled.