Add USAGE_LINUX.md — bot and CLI run instructions for Linux server

USAGE_LINUX.md

@@ -0,0 +1,42 @@
+# Running ForexBot2 on Linux
+
+## Install dependencies
+
+```bash
+python -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+```
+
+## Telegram bot
+
+```bash
+# Start (runs in background, logs to file)
+nohup .venv/bin/python telegram_bot.py >> bot.log 2>&1 &
+
+# Follow logs
+tail -f bot.log
+
+# Check it is running
+pgrep -a -f telegram_bot.py
+
+# Stop
+pkill -f telegram_bot.py
+```
+
+## Live signal (CLI)
+
+```bash
+.venv/bin/python main.py              # H1 summary
+.venv/bin/python main.py --detail     # full indicator breakdown
+.venv/bin/python main.py --json       # JSON output
+```
+
+## Backtest
+
+```bash
+.venv/bin/python main.py --backtest
+.venv/bin/python main.py --backtest --optimize
+```
+
+> No GPU required — GPU code is only used by `backtest_gpu.py`.