Switch Nginx to port 3000 for Coolify

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -22,6 +22,6 @@ FROM nginx:alpine
 COPY --from=builder /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 
-EXPOSE 80
+EXPOSE 3000
 
 CMD ["nginx", "-g", "daemon off;"]

nginx.conf

@@ -1,5 +1,5 @@
 server {
-    listen 80;
+    listen 3000;
     server_name _;
     root /usr/share/nginx/html;
     index index.html;