refactor: change ports to non-standard (backend: 8765, frontend: 4321)

frontend/Dockerfile

@@ -9,5 +9,5 @@ RUN npm run build
 FROM nginx:alpine
 COPY --from=builder /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
-EXPOSE 3000
+EXPOSE 4321
 CMD ["nginx", "-g", "daemon off;"]

frontend/nginx.conf

@@ -1,9 +1,9 @@
 server {
-    listen 3000;
+    listen 4321;
     server_name _;
 
     resolver 127.0.0.11 valid=10s;
-    set $backend_url http://backend:8000;
+    set $backend_url http://backend:8765;
 
     root /usr/share/nginx/html;
     index index.html;

frontend/vite.config.ts

@@ -5,9 +5,9 @@ export default defineConfig({
   plugins: [react()],
   server: {
     host: true,
-    port: 3000,
+    port: 4321,
     proxy: {
-      '/api': 'http://backend:8000',
+      '/api': 'http://backend:8765',
     },
   },
 })