Get site name from appsettings if possible

src/Umbraco.Core/Configuration/Models/HostingSettings.cs

@@ -22,7 +22,7 @@ namespace Umbraco.Cms.Core.Configuration.Models
         /// <summary>
         /// Gets or sets a value for the location of temporary files.
         /// </summary>
-        [DefaultValue(StaticLocalTempStorageLocation)] 
+        [DefaultValue(StaticLocalTempStorageLocation)]
         public LocalTempStorage LocalTempStorageLocation { get; set; } = Enum<LocalTempStorage>.Parse(StaticLocalTempStorageLocation);
 
         /// <summary>
@@ -31,5 +31,10 @@ namespace Umbraco.Cms.Core.Configuration.Models
         /// <value><c>true</c> if [debug mode]; otherwise, <c>false</c>.</value>
         [DefaultValue(StaticDebug)]
         public bool Debug { get; set; } = StaticDebug;
+
+        /// <summary>
+        /// Gets or sets a value specifying the name of the site.
+        /// </summary>
+        public string SiteName { get; set; }
     }
 }

src/Umbraco.Web.Common/AspNetCore/AspNetCoreHostingEnvironment.cs

@@ -37,7 +37,16 @@ namespace Umbraco.Cms.Web.Common.AspNetCore
             _webHostEnvironment = webHostEnvironment ?? throw new ArgumentNullException(nameof(webHostEnvironment));
             _urlProviderMode = _webRoutingSettings.CurrentValue.UrlProviderMode;
 
-            SiteName = webHostEnvironment.ApplicationName;
+            SetSiteName(hostingSettings.CurrentValue.SiteName);
+
+            // We have to ensure that the OptionsMonitor is an actual options monitor since we have a hack
+            // where we initially use an OptionsMonitorAdapter, which doesn't implement OnChange.
+            // See summery of OptionsMonitorAdapter for more information.
+            if (hostingSettings is OptionsMonitor<HostingSettings>)
+            {
+                hostingSettings.OnChange(settings => SetSiteName(settings.SiteName));
+            }
+
             ApplicationPhysicalPath = webHostEnvironment.ContentRootPath;
 
             if (_webRoutingSettings.CurrentValue.UmbracoApplicationUrl is not null)
@@ -53,7 +62,7 @@ namespace Umbraco.Cms.Web.Common.AspNetCore
         public Uri ApplicationMainUrl { get; private set; }
 
         /// <inheritdoc/>
-        public string SiteName { get; }
+        public string SiteName { get; private set; }
 
         /// <inheritdoc/>
         public string ApplicationId
@@ -198,7 +207,10 @@ namespace Umbraco.Cms.Web.Common.AspNetCore
                 }
             }
         }
+
+        private void SetSiteName(string siteName) =>
+            SiteName = string.IsNullOrWhiteSpace(siteName)
+                ? _webHostEnvironment.ApplicationName
+                : siteName;
     }
-
-
 }