chore: фронт :3107, API :3001 (Docker, Vite, CORS, доки)

- compose: testing-web 3107:80, testing-backend 3001:3001, PORT+FRONTEND_URL
- nginx → testing-backend:3001; Vite 3107, proxy /api → 3001
- server default PORT 3001; Dockerfile EXPOSE 3001; CORS dev — localhost:3107
- README, журнал, user guide

Made-with: Cursor

frontend/nginx-default.conf

@@ -8,7 +8,7 @@ server {
   }
   client_max_body_size 10m;
   location /api/ {
-    proxy_pass http://testing-backend:3107;
+    proxy_pass http://testing-backend:3001;
     proxy_http_version 1.1;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;

frontend/vite.config.js

@@ -4,11 +4,11 @@ import react from '@vitejs/plugin-react';
 export default defineConfig({
   plugins: [react()],
   server: {
-    port: 5173,
-    // Тот же порт, что у API на хосте (docker-compose: 3107:3107) или `npm run dev` в backend
+    port: 3107,
+    // UI на 3107; API на 3001 (docker compose и `npm run dev` в backend)
     proxy: {
       '/api': {
-        target: 'http://localhost:3107',
+        target: 'http://localhost:3001',
         changeOrigin: true,
       },
     },