Update .env.example

.env.example

@@ -1,7 +1,8 @@
 # ===== BUILD-TIME VARIABLES =====
-# These are baked into the frontend at build time
+# These variables are baked into the frontend JavaScript at build time
+# If you change them, you need to rebuild: docker compose up -d --build
 
-# API URL (relative path for same-origin, or full URL for external)
+# API URL - How the browser will access the backend
 # Same server (with proxy):  /api
 # Remote server (direct):    https://api.yourbot.com/cabinet
 VITE_API_URL=/api
@@ -9,7 +10,7 @@ VITE_API_URL=/api
 # Telegram bot username for Login Widget (without @)
 VITE_TELEGRAM_BOT_USERNAME=your_bot_username
 
-# ===== BRANDING =====
+# ===== BRANDING (optional) =====
 # App name displayed in header and browser tab
 VITE_APP_NAME=VPN Cabinet
 
@@ -17,21 +18,7 @@ VITE_APP_NAME=VPN Cabinet
 VITE_APP_LOGO=V
 
 # ===== RUNTIME VARIABLES =====
-# These are used by Caddy at runtime
 
-# Backend URL for reverse proxy (only if using proxy mode with VITE_API_URL=/api)
-# Development:               http://host.docker.internal:8080
-# Production (same network): http://remnawave_bot:8080
-# Remote server:             https://api.yourbot.com
-BACKEND_URL=https://api.yourbot.com
-
-# Port to expose the frontend
+# Port to expose the frontend on host machine
+# Default: 3000 (http://localhost:3000)
 CABINET_PORT=3000
-
-# ===== PRODUCTION ONLY =====
-
-# Domain for HTTPS (Caddy will auto-obtain certificates)
-DOMAIN=cabinet.yourdomain.com
-
-# HTTPS port (usually 443)
-CABINET_HTTPS_PORT=443