quadlets: app alias=app, nginx proxy_pass auf app, sleep entfernt

- visitcounter-app.container: Network alias=app damit nginx den Upstream findet
- nginx-default.conf: proxy_pass http://app:8080 (gleich wie Compose)
- visitcounter-proxy.container: ExecStartPre sleep entfernt

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

listings/visitcounter/quadlets/nginx-default.conf

@@ -2,7 +2,7 @@ server {
     listen 80;
 
     location / {
-        proxy_pass         http://systemd-visitcounter-app:8080;
+        proxy_pass         http://app:8080;
         proxy_set_header   Host $host;
         proxy_set_header   X-Real-IP $remote_addr;
     }

listings/visitcounter/quadlets/visitcounter-app.container

@@ -4,7 +4,7 @@ Environment=DB_HOST=systemd-visitcounter-db
 Environment=DB_NAME=visitcount
 Environment=DB_USER=app
 Environment=DB_PASSWORD=secret
-Network=visitcounter-app.network
+Network=visitcounter-app.network:alias=app
 
 [Unit]
 After=visitcounter-db.service

listings/visitcounter/quadlets/visitcounter-proxy.container

@@ -8,7 +8,6 @@ Network=visitcounter-app.network
 After=visitcounter-app.service
 
 [Service]
-ExecStartPre=/bin/sleep 3
 Restart=always
 
 [Install]