Add configurations and update packages

GerstITS.Examples.Api/Common/Configurations/WebApiConfiguration.OpenId.cs

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+using BakeTronic.Web.Api.Configurations;
+using GerstITS.Authentication.OpenId;
+using GerstITS.System.Configurations;
+using Microsoft.Extensions.Configuration;
+
+namespace GerstITS.Examples.Api.Configurations
+{
+    internal class OpenIdConfiguration : IOpenIdConfiguration
+    {
+        #region Constructors
+
+        public OpenIdConfiguration(string parentPrefix,
+                                   Microsoft.Extensions.Configuration.IConfiguration configuration)
+        {
+            var prefix = $"{parentPrefix}:{this.ToConfigurationPrefix()}";
+
+            Authority = configuration.GetValue<string>($"{prefix}:{nameof(Authority)}");
+            RequireHttpsMetadata = configuration.GetValue<bool>($"{prefix}:{nameof(RequireHttpsMetadata)}");
+            SaveToken = configuration.GetValue<bool>($"{prefix}:{nameof(SaveToken)}");
+
+            Validate = new OpenIdValidationConfiguration(prefix, configuration);
+        } 
+        
+        #endregion
+
+        #region IOpenIdConfiguration
+
+        public string Authority { get; }
+        public bool RequireHttpsMetadata { get; }
+        public bool SaveToken { get; }
+
+        public IOpenIdValidationConfiguration Validate { get; } 
+        
+        #endregion
+    }
+}