Add AI bot and guarded live environment variables

.env.example

@@ -7,5 +7,9 @@ DEMO_QUOTE_ASSET=USDT
 COINEX_API_BASE=https://api.coinex.com/v2
 COINEX_WS_SPOT=wss://socket.coinex.com/v2/spot
 DEFAULT_MARKET=BTCUSDT
+MARKET_UNIVERSE=BTCUSDT,ETHUSDT,SOLUSDT,XRPUSDT,DOGEUSDT,BNBUSDT,ADAUSDT,TONUSDT
 DATABASE_URL=postgresql+psycopg://trade:trade@postgres:5432/trade
 REDIS_URL=redis://redis:6379/0
+COINEX_ACCESS_ID=
+COINEX_SECRET_KEY=
+LIVE_REQUIRES_ACK_TEXT=I_UNDERSTAND_LIVE_TRADING_RISK