HSTS Configuration for docker container on App Service

### Description

Not sure this is the correct page on comment on but seems to be the closest

I'm trying to get the `Strict-Transport-Security` header emitted whilst running as a docker container in Azure App Service and the advice given doesn't work i.e. I have the ForwardedHeadersOptions and the UseHsts set but no headers configured.

I did find a [blog article](https://developers.de/2022/09/26/how-to-deploy-asp-net-with-enabled-ssl-in-linux-container) which gives a solution that works...

```
services.Configure(options =>
{
options.ForwardedHeaders = ForwardedHeaders.All;
options.KnownNetworks.Clear();
options.KnownProxies.Clear();
});
```
Clearing the values then turns on the header, which implies the defaults don't work for my scenario, so...

1. What should the KnownNetworks be set to
2. What should the KnownProxies be set to

### Page URL

https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/proxy-load-balancer?view=aspnetcore-8.0#when-it-isnt-possible-to-add-forwarded-headers-and-all-requests-are-secure

### Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/host-and-deploy/proxy-load-balancer.md

### Document ID

c48abb08-bea3-dcff-c067-2edf5dc9b3a6

### Article author

@Rick-Anderson