diff --git a/nginx/conf.d/default.conf.template b/nginx/conf.d/default.conf.template
index de011bc..b99d13f 100644
--- a/nginx/conf.d/default.conf.template
+++ b/nginx/conf.d/default.conf.template
@@ -1,7 +1,5 @@
 # ---------------------------  ENV-Key übernehmen  ---------------------------
 # envsubst ersetzt ${MEDIA_API_KEY} durch den Wert aus docker-compose.yml
-set $secret_key "${MEDIA_API_KEY}";
-set $server_url "${SERVER_NAME}";
 
 map $request_method $cors_preflight {
     "OPTIONS" 1;
@@ -10,7 +8,7 @@ map $request_method $cors_preflight {
 
 server {
     listen 80;
-    server_name $server_url;
+    server_name ${SERVER_NAME};
 
     root /usr/share/nginx/html;
     index index.html;
@@ -29,7 +27,7 @@ server {
 
         # --- Key-Check (nur GET/HEAD) ---
         if ($request_method != "OPTIONS") {
-            if ($http_x_api_key != $secret_key) { return 401; }
+            if ($http_x_api_key != "${MEDIA_API_KEY}") { return 401; }
         }
 
         # --- CORS & Cache ---