feat(demo): add auth flow UI service

.env.example

@@ -11,11 +11,16 @@ OTP_TTL_SECONDS=120
 OTP_MAX_ATTEMPTS=5
 OTP_REQUEST_LIMIT=3
 OTP_REQUEST_WINDOW_SECONDS=300
-SMS_PROVIDER=kavenegar
+SMS_PROVIDER=debug
 KAVENEGAR_API_KEY=replace-with-real-key
 KAVENEGAR_LOGIN_TEMPLATE=login-otp
 SMS_IR_API_KEY=replace-with-real-key
 SMS_IR_VERIFY_TEMPLATE_ID=570574
+AUTH_GRPC_TARGET=localhost:50051
+DEMO_ENABLE_DEBUG_OTP=true
+DEMO_DEBUG_SMS_TTL_SECONDS=300
+DEMO_HOST=0.0.0.0
+DEMO_PORT=8080
 ADMIN_MOBILE=989120000000
 GRPC_HOST=0.0.0.0
 GRPC_PORT=50051