Method tryValidateOrExit

packages/cli/src/util/dev/server.ts:901–911

(
    config: VercelConfig,
    validate: (c: VercelConfig) => string | null
  )

  }

  async tryValidateOrExit(
    config: VercelConfig,
    validate: (c: VercelConfig) => string | null
  ): Promise<void> {
    const message = validate(config);

    if (message) {
      output.error(message);
      await this.exit(1);
    }
  }

  async validateVercelConfig(config: VercelConfig): Promise<void> {
    if (config.version === 1) {