docs: unify Ubuntu root /opt PM2 deployment and refresh README

Add docs/ubuntu-server.md; remove Windows and alternate process managers from deployment guides; index strategy, key monitor, TP/SL, breakeven, and replay docs in root README.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/setup_env.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# crypto_monitor 一键环境部署（Linux / macOS / Git Bash）
+# crypto_monitor 一键环境部署（Ubuntu / root /opt/crypto_monitor）
 #
 # 用法:
 #   bash deploy/setup_env.sh
@@ -253,6 +253,5 @@ install_pm2
 echo ""
 echo "部署完成。下一步："
 echo "  1. 编辑各子目录 .env"
-echo "  2. 启动示例: cd crypto_monitor_binance && source .venv/bin/activate && python app.py"
-echo "  3. Windows 可用: powershell -File deploy/setup_env.ps1"
+echo "  2. 编辑各目录 .env 后使用 PM2: pm2 start ecosystem.config.cjs（见 docs/ubuntu-server.md）"
 echo ""