Adjust nginx configuration for about pages

docker/nginx/locations

@@ -1,23 +1,30 @@
     # Frontend
+    root /usr/local/app/frontend/dist/digital-fuesim-manv;
+    error_page 404 /index.html;
+    error_page 403 /index.html;
+
+    location /assets/about {
+        # Requests to this location should not fall back to index.html
+    }
+
     location / {
-        alias   /usr/local/app/frontend/dist/digital-fuesim-manv/;
         try_files $uri $uri/ /index.html;
     }
 
     # API
     location /api {
-		proxy_pass	http://localhost:3201;
+        proxy_pass	http://localhost:3201;
         proxy_http_version 1.1;
         proxy_set_header   Host $host;
         proxy_set_header   X-Forwarded-Host  $host;
         proxy_set_header   X-Real-IP $remote_addr;
         proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header   X-Forwarded-Proto $scheme;
         include conf.d/upload-limit;
-	}
+    }
 
     # Websocket
-	location /socket.io {
+    location /socket.io {
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";
         proxy_pass http://localhost:3200;
@@ -28,4 +35,4 @@
         proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header   X-Forwarded-Proto $scheme;
         include conf.d/upload-limit;
-	}
+    }

frontend/src/app/pages/about/about-placeholder/about-placeholder.component.html

@@ -3,7 +3,8 @@ <h1 class="display-3 mt-3">Digitale FüSim MANV</h1>
     <h2 class="display-4">{{ pageTitle }}</h2>
 
     <p>
-        <a (click)="back($event)" href="#">Zurück zur vorherigen Seite</a>
+        <a (click)="back($event)" href="#">Zurück zur vorherigen Seite</a> |
+        <a routerLink="/">Zur Startseite</a>
     </p>
 
     <div