https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.configuration.environmentvariablesextensions.addenvironmentvariables?view=net-10.0-pp
EnvironmentVariablesExtensions.AddEnvironmentVariables Method (Microsoft.Extensions.Configuration)...
Adds an IConfigurationProvider that reads configuration values from environment variables.
methodmicrosoftextensionsconfiguration