Adding note about bootstrapping dotnet on macOS and Linux

Author: Keboo

docs/packaging/bootstrapping.mdx

@@ -13,6 +13,10 @@ These dependencies will be downloaded and installed before your application will
 If you are building a dotnet application with `--self-contained`, you should **NOT** provide a `--framework` argument specifying that your app requires dotnet installed, because your application already has the runtime bundled in. If you are publishing your application with `--no-self-contained`, then you should provide the `--framework` argument.
 :::
 
+:::note
+Bootstrapping dotnet is not available on macOS and Linux. It is recommended to distribute your application as a [self-contained package](https://learn.microsoft.com/dotnet/core/deploying/?pivots=visualstudio#self-contained-deployment) instead. 
+:::
+
 ## Adding dependencies during updates
 
 Velopack will check that all required dependencies are installed before applying new updates. This means if a new version of your app adds a new dependency, the user will be prompted to install it before your new version is applied.