Clarify private key closes #110

Author: Ric Harvey

README.md

@@ -85,9 +85,9 @@ docker run -d -e 'GIT_EMAIL=email_address' -e 'GIT_NAME=full_name' -e 'GIT_USERN
 #### SSH keys
 
 ##### Preparing your SSH key
-The container has the option for you to pass it the __SSH_KEY__ variable with a **base64** encoded private key. First generate your key and then make sure to add it to github and give it write permissions if you want to be able to push code from the container. Then run:
+The container has the option for you to pass it the __SSH_KEY__ variable with a **base64** encoded **private** key. First generate your key and then make sure to add it to github and give it write permissions if you want to be able to push code from the container. Then run:
 ```
-base64 -w 0 /path_to_your_key
+base64 -w 0 /path_to_your_private_key
 ```
 **Note:** Copy the output, but be careful not to copy your prompt