feat: add imprint to map

frontend/index.html

@@ -112,8 +112,8 @@
         <a class="stretched-link"></a>
       </div>
     </div>
-    <div class="text-center m-2 mt-4">
-      <a class="small" href="" onclick="return showNotice('imprint')">Impressum</a>
+    <div class="text-center mx-2 my-4">
+      <a class="small link-success" href="" onclick="return showNotice('imprint')">Impressum</a>
     </div>
   </div>
 

frontend/script.js

@@ -230,7 +230,10 @@ function setDetailMarker(place) {
 
 async function initMainMap() {
     const osm = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
-        attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>',
+        attribution: [
+            '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>',
+            '<a href="" onclick="return showNotice(\'imprint\')">Impressum</a>',
+        ].join(' | '),
     });
     const map = L.map('map', {
         layers: [osm],