fix port

Dockerfile

@@ -27,6 +27,6 @@ COPY --from=build /app/dist /usr/share/nginx/html
 
 COPY nginx.conf /etc/nginx/nginx.conf
 
-EXPOSE 80
+EXPOSE 80 3000
 
 CMD ["nginx", "-g", "daemon off;"]

nginx.conf

@@ -38,7 +38,12 @@ http {
         font/woff2;
 
     server {
+        # 80 is the conventional port; 3000 is what Dokploy targets by default in
+        # its domain config. Binding both means Traefik reaches the app whichever
+        # one the dashboard's Port field is set to, so a deploy can't 502 purely
+        # because those two numbers disagree.
         listen 80;
+        listen 3000;
         server_name _;
 
         root  /usr/share/nginx/html;