typo in readme.

Author: xueshanf

README.md

@@ -14,9 +14,10 @@ docker run --rm  xueshanf/awscli s3cmd --version
 Examples
 ========
 
-Rebuld image. This will upgrade the package too:
+Rebuild image. This will upgrade the package too:
 
 ```
+core@n1 git clone https://github.com/xueshanf/docker-awscli.git
 core@n1 docker build -t xueshanf/awscli:latest .
 ```
 
@@ -40,6 +41,7 @@ ZONE
 core@n1 docker run --rm  xueshanf/awscli get-metadata instanceid
 i-453266b2
 ```
+Command line argument is not case sensitve. 
 
 Copy data from s3 bucket to local file system: