Use environment variables substitution

Author: Sergey Tregub

ProjectTemplates/ReferenceProject/Configuration/ApplicationSettings.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Contrib.Extensions.Configuration;
 
 namespace ReferenceProject.Configuration
 {
@@ -8,7 +9,8 @@ public static class ApplicationSettings
         public static void AddSettings(this IServiceCollection services, IConfiguration Configuration)
         {
             services.AddOptions<Settings.Products>()
-                .Bind(Configuration.GetSection(Settings.Products.SectionName));
+                .Bind(Configuration.GetSection(Settings.Products.SectionName))
+                .SubstituteVariables();
         }
     }
 }