add sqlserver health check.

Author: omid-ahmadpour

src/Web/Api/DependencyInjection.cs

@@ -57,7 +57,8 @@ public static IServiceCollection AddWebApi(this IServiceCollection services, ICo
             services.AddValidatorsFromAssembly(Assembly.GetExecutingAssembly());
             services.AddPolyCache(configuration);
 
-            services.AddHealthChecks();
+            services.AddHealthChecks()
+                    .AddSqlServer(appOptions.WriteDatabaseConnectionString);
             services.AddHealthChecksUI()
                     .AddInMemoryStorage();