fix build

Dockerfile

@@ -13,6 +13,6 @@ COPY build/ .
 # 3. Copy your custom Nginx configuration (which you already have in your log)
 COPY nginx.conf /etc/nginx/nginx.conf
 
-EXPOSE 80
+EXPOSE 3000 80
 
 CMD ["nginx", "-g", "daemon off;"]

nginx.conf

@@ -6,6 +6,7 @@ http {
 
     server {
         listen 80;
+        listen 3000;
         server_name localhost;
 
         location / {