.gitignore里写明了一些故意不想存在于版本库里的文件
lib-cov *.seed *.log *.csv *.dat *.out *.pid *.gz pids logs results npm-debug.log .DS_Store node_modules .idea *.iml *.sqlite3
参考:
https://github.com/github/gitignore/blob/master/Node.gitignore
https://raw.githubusercontent.com/github/gitignore/master/Node.gitignore