Resolve "Add a "GDPR" notice"

Closes #56 (closed)

templates/base.html.twig

@@ -65,6 +65,14 @@
             {% block content %}{% endblock %}
         </div>
 
+        <div class="container text-muted">
+            We don't collect or keep any personal data.
+            <br />
+            Your top artists and playlists are read from your Spotify account, playlists are generated "on the fly" and directly saved to your Spotify account.
+            <br />
+            Some access log (with your IP) are technically generated, but never read :')
+        </div>
+
         {% endblock %}
 
         {% block javascripts %}{{ encore_entry_script_tags('app') }}{% endblock %}