Update RN doc

docs/en/Getting-Started-React-Native.md

@@ -74,6 +74,20 @@ A React Native application running on an Android emulator or a physical phone **
 
 Run the backend application as described in the [getting started document](Getting-Started.md).
 
+> You should turn off "Https Restriction" if you're using OpenIddict as a central identity management solution. Because the IOS Simulator doesn't support self-signed certificates and OpenIddict is set to only work with HTTPS by default.
+## How to disable Https-only settings of OpenIddict
+
+ Go to MyProjectNameHttpApiHostModule.cs under the host project. Add these codes under `PreConfigureServices` function.
+
+```csharp
+#ifDEBUG
+PreConfigure<OpenIddictServerBuilder>(options => {
+options.UseAspNetCore()
+.DisableTransportSecurityRequirement();
+});
+#endif
+```
+
 
 ## How to Configure & Run the React Native Application