Update reamdme file.

Author: mo-esmp

README.md

@@ -1,2 +1,48 @@
 # serilog-ui
-Simple web UI for several Serilog sinks.
+A simple log viewer to see logs saved by [Serilog.Sinks.MSSqlServer](https://github.com/serilog/serilog-sinks-mssqlserver).
+
+![serilog ui](https://raw.githubusercontent.com/mo-esmp/serilog-ui/master/assets/serilog-ui.jpg)
+
+Install the _Serilog.UI_ [NuGet package](https://www.nuget.org/packages/Serilog.UI) and _Serilog.Ui.MsSqlServerProvider_ [NuGet package](https://www.nuget.org/packages/Serilog.Ui.MsSqlServerProvider)
+
+```powershell
+Install-Package Serilog.UI
+Install-Package Serilog.UI.MsSqlServerProvider
+```
+or
+```shell
+dotnet add package Serilog.UI
+dotnet add package Serilog.UI.MsSqlServerProvider
+```
+
+**Then**, add `UseSerilogUi()` to `IServiceCollection` in `ConfigureServices` method:
+
+```csharp
+public void ConfigureServices(IServiceCollection services)
+{
+    var mvcBuilder = services.AddControllersWithViews();
+    services.AddSerilogUi(mvcBuilder, options => options.UseSqlServer("ConnectionString", "Logs"));
+    .
+    .
+    .
+```
+
+You can also secure log viewer by allwoing specific users or roles to view logs:
+```csharp
+public void ConfigureServices(IServiceCollection services)
+{
+    var mvcBuilder = services.AddControllersWithViews();
+    services.AddSerilogUi(mvcBuilder, options => options
+        .EnableAuthorization(authOptions =>
+        {
+            authOptions.Usernames = new[] { "User1", "User2" };
+            authOptions.Roles = new[] { "AdminRole" };
+        })
+        .UseSqlServer(Configuration.GetConnectionString("DefaultConnection"), "Logs"));
+    .
+    .
+    .
+```
+Only `User1` and `User2` or users with `AdminRole` role can view logs.
+
+