feat: Update backend .env.example with LoRRI production config and BRAIN_URL

ops/backend-dm/.env.example

@@ -1,18 +1,35 @@
-# FairRelay Ops Backend (Node.js/Express)
-# Copy .env.example and fill in your values
-DATABASE_URL="postgresql://postgres:password@localhost:5432/fairrelay"
-DIRECT_URL="postgresql://postgres:password@localhost:5432/fairrelay"
+# ═══════════════════════════════════════════════════════════════
+# FairRelay Backend — Node.js API Gateway
+# ═══════════════════════════════════════════════════════════════
+# This is the main API gateway that the ops dashboard and LoRRI
+# platform connect to. It proxies AI requests to the FastAPI brain.
+
+# Server
+NODE_ENV=production
 PORT=3000
-JWT_SECRET=change-me-to-a-real-secret
-NODE_ENV=development
 
-# Twilio OTP (get credentials from https://console.twilio.com)
+# PostgreSQL Database (Render managed, or Supabase, or Railway)
+DATABASE_URL=postgresql://user:password@host:5432/fairrelay?schema=public
+
+# AI Brain (FastAPI + LangGraph multi-agent system)
+# This is the FairRelay brain service running on Render
+BRAIN_URL=https://fairrelay-brain.onrender.com
+
+# JWT Authentication
+JWT_SECRET=change-this-to-a-secure-random-string-in-production
+
+# CORS Origins (comma-separated)
+# Include LoRRI production domain + ops dashboard + local dev
+CORS_ORIGINS=https://logisticsnow.in,https://app.lorri.in,https://fairrelay.vercel.app,http://localhost:5173
+
+# Gemini API (for LLM explanations in brain)
+GOOGLE_API_KEY=
+
+# OTP Provider (for driver/dispatcher auth)
+OTP_PROVIDER=twilio
 TWILIO_ACCOUNT_SID=
 TWILIO_AUTH_TOKEN=
-TWILIO_PHONE_NUMBER=
-
-# CORS origins (comma-separated, used in production)
-CORS_ORIGINS=https://fairrelay.vercel.app,https://fairrelay-dashboard.vercel.app
+TWILIO_PHONE=
 
-# Brain AI backend URL
-BRAIN_URL=http://localhost:8000
+# Socket.IO (real-time updates)
+SOCKET_CORS_ORIGINS=https://logisticsnow.in,https://app.lorri.in,https://fairrelay.vercel.app