fix: update configuration key from SiteUrl to BaseUrl for forum integration

Author: frasermolyneux

src/XtremeIdiots.Portal.Web/ApiControllers/HealthCheckController.cs

@@ -32,7 +32,7 @@ public HealthCheckController(
         ArgumentNullException.ThrowIfNull(forumsClient);
         this.forumsClient = forumsClient;
 
-        var expectedCommunityUrl = configuration["XtremeIdiots:Forums:SiteUrl"] ?? "https://www.xtremeidiots.com";
+        var expectedCommunityUrl = configuration["XtremeIdiots:Forums:BaseUrl"] ?? "https://www.xtremeidiots.com";
         var expectedCommunityUrlWithTrailingSlash = expectedCommunityUrl.TrimEnd('/') + "/";
 
         healthCheckComponents.Add(new HealthCheckComponent

src/XtremeIdiots.Portal.Web/Areas/Identity/IdentityHostingStartup.cs

@@ -113,7 +113,7 @@ private static void ConfigureAuthentication(IServiceCollection services, IConfig
 
             options.CallbackPath = new PathString("/signin-xtremeidiots");
 
-            var forumSiteUrl = (configuration["XtremeIdiots:Forums:SiteUrl"] ?? "https://www.xtremeidiots.com").TrimEnd('/');
+            var forumSiteUrl = (configuration["XtremeIdiots:Forums:BaseUrl"] ?? "https://www.xtremeidiots.com").TrimEnd('/');
             options.AuthorizationEndpoint = configuration["xtremeidiots_auth_authorization_endpoint"] ?? $"{forumSiteUrl}/oauth/authorize/";
             options.TokenEndpoint = configuration["xtremeidiots_auth_token_endpoint"] ?? $"{forumSiteUrl}/oauth/token/";
             options.UserInformationEndpoint = configuration["xtremeidiots_auth_userinfo_endpoint"] ?? $"{forumSiteUrl}/api/core/me";