fix: Docker compatibility

Dockerfile

@@ -13,7 +13,6 @@ COPY . .
 # Build React app
 RUN npm run build
 
-
 # ---------- Production stage ----------
 FROM nginx:alpine
 
@@ -26,6 +25,7 @@ COPY nginx.conf /etc/nginx/conf.d/default.conf
 # Copy build output
 COPY --from=build /app/dist /usr/share/nginx/html
 
-EXPOSE 3000
+# Expose standard nginx port
+EXPOSE 80
 
 CMD ["nginx", "-g", "daemon off;"]

nginx.conf

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