Update 'README.md'

README.md

@@ -62,6 +62,15 @@ Git Commands
 | `git init` | Initialize a local Git repository |
 | `git clone ssh://git@github.com/[username]/[repository-name].git` | Create a local copy of a remote repository |
 
+### ignore or exeption
+
+- create file .gitignore
+- add line example
+```
+foldername
+*.pid //file extension
+```
+
 ### Basic Snapshotting
 
 | Command | Description |