git中忽略无用的文件

忽略特殊文件

https://www.gitignore.io/

第一个规则：
Ingore folder and files which are generated by building or compile, folder named bin should be ingored.
Create a file named .gitignore in your projects directory. Ignore directories by entering the directory name into the file (with a slash appended):

dir_to_ignore/