Adds gitter link in the footer (#16)

* Adds gitter link in the footer, updates readme with some instructions for working on the website.

* Removes whitespace

Author: FedericoPonzi

README.md

@@ -2,6 +2,15 @@
 
 This repository contains the source code for our organization homepage at <https://rust-osdev.com>.
 
+# Development 
+In order to build the website, first you will need to install the [zola](https://github.com/getzola/zola/releases) static site generator.
+
+Then you can run:
+```
+./zola serve
+```
+and open <a href="http://127.0.0.1:1111/">localhost:1111</a>
+
 ## License
 
 Licensed under either of

templates/base.html

@@ -35,7 +35,7 @@ <h3 class="masthead-title">
 
             <footer class="footer">
                 <hr>
-                <small>
+                <small>Join us on <a href="https://gitter.im/rust-osdev/Lobby" >Gitter.</a><br>
                     &copy; <time datetime="2020">2020</time>. All rights reserved.
                     <a href="{{ get_url(path="@/pages/contact.md") | safe }}">Contact</a>
                 </small>