Document Telegram bot auto-update flow

gotelegram-bot/README.md

@@ -31,6 +31,14 @@ Production-quality Telegram bot for managing MTProxy (telemt engine) on Linux se
 
 ## Installation
 
+Recommended installation path is the main CLI menu:
+
+```bash
+gotelegram
+```
+
+Then choose `12) Telegram-bot` → install/update. On repeat goTelegram Pro bootstrap/update, an already installed bot is refreshed automatically: code, i18n files and requirements are copied to `/opt/gotelegram-bot`, `.env` is preserved, dependencies are checked and `gotelegram-bot` is restarted.
+
 ### Prerequisites
 
 - Python 3.8+
@@ -73,11 +81,11 @@ After=network.target
 
 [Service]
 Type=simple
-User=gotelegram
-WorkingDirectory=/opt/gotelegram/bot
-ExecStart=/usr/bin/python3 /opt/gotelegram/bot/bot.py
+WorkingDirectory=/opt/gotelegram-bot
+ExecStart=/opt/gotelegram-bot/venv/bin/python /opt/gotelegram-bot/bot.py
 Restart=always
-RestartSec=10
+RestartSec=5
+Environment=PATH=/opt/gotelegram-bot/venv/bin:/usr/bin
 
 [Install]
 WantedBy=multi-user.target
@@ -89,6 +97,7 @@ WantedBy=multi-user.target
 
 - `BOT_TOKEN` - Telegram bot token (required)
 - `ALLOWED_IDS` - Comma-separated user IDs (optional, all users allowed if empty)
+- `BOT_LANG` - Default language inherited from goTelegram Pro install language
 
 ### System Paths