chat implemented

need testing

apps/realtime/.env.example

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+# Realtime service port
+REALTIME_PORT=3001
+
+# Comma-separated allowed origins for Socket.IO CORS
+# Example: http://localhost:3000,http://localhost:8081
+REALTIME_CORS_ORIGIN=http://localhost:3000,http://localhost:8081
+
+# Socket.IO path (must match clients)
+REALTIME_SOCKET_PATH=/socket.io
+
+# Clerk secret key (required for token verification)
+CLERK_SECRET_KEY=sk_test_your_secret_key_here
+
+# Redis URL (optional but recommended for multi-instance scaling + distributed rate limits)
+REDIS_URL=redis://localhost:6379
+
+# Optional database path override (shared with @fitai/database)
+# FITAI_DATABASE_PATH=../../apps/admin/data/fitai.db
+# DATABASE_PATH=../../apps/admin/data/fitai.db