Schulportal-Konventionen übernommen: Dark Mode (ThemeToggle), beispieldaten.py + generated.json, kimi.md, mail-server (Postfix-Relay + API), Deploy-Workflow (pscp/plink, npm_default), Screenshots in preview/

docker/nginx.conf

@@ -9,6 +9,11 @@ server {
     gzip_types      text/css application/javascript image/svg+xml application/json;
     gzip_min_length 1024;
 
+    # HTML nie cachen (Assets sind hash-benannt → ein Reload genügt)
+    location = /index.html {
+        add_header Cache-Control "no-cache" always;
+    }
+
     # Cache für gehashte Build-Assets
     location /assets/ {
         expires 30d;