added footer with imprint, privacy policy and sourcecode links

src/App.css

@@ -41,6 +41,13 @@ p{
     width: calc(40vh + 15vw);
 }
 
+a{
+    color: white;
+}
+a:hover{
+    color: rgba(255,255,255,0.8);
+}
+
 .HeaderImage{
     height: calc(10px + 30vmin);
     max-width: 100%;

src/App.js

@@ -317,6 +317,14 @@ function App() {
 
                 <button onClick={handleDownload}>Download Profile Picture</button>
             </>) : null}
+
+            <footer>
+                <a href="https://www.voltdeutschland.org/impressum">Imprint</a>
+                &nbsp; • &nbsp;
+                <a href="https://www.voltdeutschland.org/datenschutz">Privacy Policy</a>
+                &nbsp; • &nbsp;
+                <a href="https://github.com/voltbonn/profile-picture-generator">Source Code</a>
+            </footer>
         </div>
     )
 }