运行miniprogram-ci预览命令时，一直提示如下错误：

processing: app.json
done: app.json
processing: ext.json
done: ext.json
processing: pages/main/home/index
(node:32202) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, open '/XXX/project.config.json'
(node:32202) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:32202) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

project.config.json是微信开发者工具自动生成的，ci工具无法生成该文件，但ci命令又需要用到该文件，有办法解决这个报错嘛