Add codecentric AG as a sponsor (#378)

index.html

@@ -199,6 +199,13 @@
                                 We at <a href="https://www.quatico.com/">Quatico</a> believe in quality, standards and modern architectures powered with and by open source software. We love the web, build our long-term relationships on microservices and actively date microfrontends.</p>
                             <p><a href="https://www.quatico.com">Quatico</a> supports Hackergarten with a place to meet in the tech heart of Zurich and provides Drinks, Pizza and Internet.</p>
                         </li>
+                        <li>
+                            <a href="https://www.codecentric.de"><img src="pictures/codecentric.png" alt="codecentric AG logo" height="80"></a>
+                            <p>
+                                As a pioneer for agile and custom software development, <a href="https://www.codecentric.de">codecentric AG</a> has been a thought leader for innovative technologies in Germany for 19 years. codecentric helps companies to meet the challenges of digital transformation proactively, and empowers them to develop and sustain digital competitive advantages.
+                            <p>
+                            <p>codecentric provides us a place to meet, Internet access, drinks, and a pizza budget.</p>
+                        </li>
                         <li>
                             Want to see the Sponsor of your Hackergarten here?
                             <a href="https://github.com/hackergarten/hackergarten.github.io/edit/master/index.html"