adding link to contributing clause / code of conduct

Author: vsoch

pages/docs/contributing/contributing-code.md

@@ -15,7 +15,7 @@ To contribute to the development of Singularity, you must:
 - Have a GitHub account (this just makes it easier on me)
 
 
-We use the traditional <a href="https://guides.github.com/introduction/flow/" target="_blank">Github Flow</a> to develop. This means that you fork the repo and checkout a branch to make changes, you submit a pull request (PR) to the development branch with your changes, and the development branch gets merged with master for official releases.
+We use the traditional <a href="https://guides.github.com/introduction/flow/" target="_blank">Github Flow</a> to develop. This means that you fork the repo and checkout a branch to make changes, you submit a pull request (PR) to the development branch with your changes, and the development branch gets merged with master for official releases. We also have an official <a href="https://github.com/singularityware/singularity/blob/master/CONTRIBUTING.md" target="_blank">CONTRIBUTING</a> document, which also includes a <a href="https://github.com/singularityware/singularity/blob/development/CONTRIBUTING.md#code-of-conduct" target="_blank">code of conduct</a>.
 
 
 ### Step 1. Fork the repo

pages/docs/contributing/contributing-docs.md

@@ -20,6 +20,13 @@ Initially (on OS X), you will need to setup [Brew](http://brew.sh/) which is a p
 brew install git
 ```
 
+If you are on Debian/Ubuntu, then you can easily install git with `apt-get`
+
+```bash
+apt-get update && apt-get install -y git
+```
+
+
 ### Fork the repo
 To contribute to the web based documentation, you should obtain a GitHub account and *fork* the <a href="https://github.com/singularityware/singularityware.github.io/" target="_blank">Singularity GitHub Pages</a> repository by clicking the *fork* button on the top right of the page. Once forked, you will want to clone the fork of the repo to your computer. Let's say my Github username is *user99*: