diff --git a/Dockerfile b/Dockerfile
index 9cbc51a..60327a7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,8 +18,10 @@ COPY --from=build /app/nginx.conf /etc/nginx/http.d/default.conf
 WORKDIR /app
 COPY --from=build /app/server ./server
 
-# Başlangıç: Node backend'i (3001) arka planda + nginx ön planda
-RUN printf '#!/bin/sh\nset -e\nnode /app/server/index.js &\nexec nginx -g "daemon off;"\n' > /start.sh \
+# Başlangıç: Node backend'i (sabit 3001) arka planda + nginx (80) ön planda.
+# Coolify container'a PORT=80 verir; backend'i 3001'e sabitleyip nginx ile
+# çakışmasını önlüyoruz (nginx /api → 127.0.0.1:3001 proxy'ler).
+RUN printf '#!/bin/sh\nset -e\nPORT=3001 node /app/server/index.js &\nexec nginx -g "daemon off;"\n' > /start.sh \
     && chmod +x /start.sh
 
 EXPOSE 80