Improve SPA cacheing

Reviewed-on: #78

etc/nginx/conf.d/default.conf

@@ -9,10 +9,24 @@ server {
 
     #access_log  /var/log/nginx/host.access.log  main;
 
+    root   /usr/share/nginx/html;
+
+    # routes without dots serve the index.html without caching
     location / {
-        root   /usr/share/nginx/html;
-        index  index.html index.htm;
-        try_files $uri $uri/ /index.html;
+        add_header Cache-Control "no-cache";
+        try_files $uri $uri/index.html /index.html;
+    }
+  
+    # static js and css files that get replaced instead of updated
+    location ~ \.(js|css) {
+        add_header Cache-Control "public, max-age=31536000, immutable";
+        try_files $uri =404;
+    }
+  
+    # cache other static files for 30 days
+    location ~ \.(?!html) {
+        add_header Cache-Control "public, max-age=2592000";
+        try_files $uri =404;
     }
 
     #error_page  404              /404.html;

src/components/Footer.vue

@@ -13,7 +13,7 @@ SPDX-License-Identifier: AGPL-3.0-or-later
           <div class="fw-bold text-white mb-2">Kompetenzinventar</div>
           <ul class="list-unstyled">
             <li><a href="https://git.wtf-eg.de/kompetenzinventar">Quellcode</a></li>
-            <li><a href="https://git.wtf-eg.de/kompetenzinventar/ki-frontend/issues/new">Problem melden</a></li>
+            <li><a href="https://git.wtf-eg.de/kompetenzinventar/ki-doku/issues/new/choose">Problem melden</a></li>
           </ul>
         </div>
       </div>

src/views/Search.vue

@@ -19,7 +19,7 @@ SPDX-License-Identifier: AGPL-3.0-or-later
                     class="form-control"
                     id="searchText"
                     v-model="searchText"
-                    placeholder="Nick, Fähigkeit, Sprache"
+                    placeholder="Nick, Name, Fähigkeit, Sprache"
                     ref="searchTextInput"
                   />
                 </div>