Try setting up installer/updater

.github/workflows/main.yml

@@ -0,0 +1,28 @@
+name: Deploy to GitHub Releases
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy-to-github-releases:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Install .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 8.0.x
+
+      - name: Publish Application
+        run: dotnet publish WorldClockStatusWindow/WorldClockStatusWindow.csproj -c Release -o publish -r win-x64 --self-contained true
+
+      - name: Create Velopack Release
+        run: |
+          dotnet tool install -g vpk
+          vpk download github --repoUrl https://github.com/ckaczor/WorldClockStatusWindow
+          vpk pack -u MyUniqueIdentifier -v ${{ steps.get-version.outputs.version }} -p publish
+          vpk upload github --repoUrl https://github.com/ckaczor/WorldClockStatusWindow --publish --releaseName "WorldClockStatusWindow ${{ steps.get-version.outputs.version }}" --tag v${{ steps.get-version.outputs.version }}

Program.cs

@@ -0,0 +1,27 @@
+using Microsoft.Extensions.Logging;
+using Serilog;
+using System;
+using Velopack;
+
+namespace WorldClockStatusWindow;
+
+internal class Program
+{
+    [STAThread]
+    public static void Main(string[] args)
+    {
+        Log.Logger = new LoggerConfiguration().WriteTo.File("log.txt").CreateLogger();
+
+        Log.Logger.Information("Start");
+
+        var loggerFactory = new LoggerFactory().AddSerilog(Log.Logger);
+
+        VelopackApp.Build().Run(loggerFactory.CreateLogger("Install"));
+
+        var app = new App();
+        app.InitializeComponent();
+        app.Run();
+
+        Log.Logger.Information("End");
+    }
+}

WindowSource.cs

@@ -5,8 +5,14 @@ using System.Linq;
 using System.Reflection;
 using System.Text;
 using System.Text.Json;
+using System.Threading.Tasks;
 using System.Timers;
 using System.Windows.Threading;
+using Serilog;
+using Serilog.Core;
+using Velopack;
+using Velopack.Sources;
+using WorldClockStatusWindow.Properties;
 
 namespace WorldClockStatusWindow;
 
@@ -25,9 +31,47 @@ internal class WindowSource : IWindowSource, IDisposable
 
         _dispatcher = Dispatcher.CurrentDispatcher;
 
+        _timer = new Timer(1000);
+
+        Task.Factory.StartNew(UpdateApp).ContinueWith(_ => Start());
+    }
+
+    private async Task<bool> UpdateApp()
+    {
+        try
+        {
+            var updateManager = new UpdateManager(new GithubSource("https://github.com/ckaczor/WorldClockStatusWindow", null, false));
+
+            if (!updateManager.IsInstalled)
+                return false;
+
+            _dispatcher.InvokeAsync(() => _floatingStatusWindow.SetText("Checking for update..."));
+
+            var newVersion = await updateManager.CheckForUpdatesAsync();
+
+            if (newVersion == null)
+                return false;
+
+            _dispatcher.InvokeAsync(() => _floatingStatusWindow.SetText("Downloading update..."));
+
+            await updateManager.DownloadUpdatesAsync(newVersion);
+
+            _dispatcher.InvokeAsync(() => _floatingStatusWindow.SetText("Installing update..."));
+
+            updateManager.ApplyUpdatesAndRestart(newVersion);
+        }
+        catch (Exception e)
+        {
+            Log.Logger.Error(e, nameof(UpdateApp));
+        }
+
+        return true;
+    }
+
+    private void Start()
+    {
         Load();
 
-        _timer = new Timer(1000);
         _timer.Elapsed += HandleTimerElapsed;
         _timer.Enabled = true;
     }
@@ -71,6 +115,10 @@ internal class WindowSource : IWindowSource, IDisposable
             text.Append($"{timeZoneEntry.Label.PadLeft(labelLength)}: {TimeZoneInfo.ConvertTime(now, timeZone).ToString(Properties.Settings.Default.TimeFormat)}");
         }
 
+        text.AppendLine();
+        text.AppendLine();
+        text.Append($"Version: {Assembly.GetEntryAssembly()!.GetName().Version!.ToString()}");
+
         _dispatcher.InvokeAsync(() => _floatingStatusWindow.SetText(text.ToString()));
     }
 

WorldClockStatusWindow.csproj

@@ -5,6 +5,7 @@
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <UseWPF>true</UseWPF>
     <ImportWindowsDesktopTargets>true</ImportWindowsDesktopTargets>
+    <StartupObject>WorldClockStatusWindow.Program</StartupObject>
   </PropertyGroup>
   <ItemGroup>
     <AppDesigner Include="Properties\" />
@@ -13,7 +14,12 @@
     <PackageReference Include="ChrisKaczor.Wpf.Application.StartWithWindows" Version="1.0.5" />
     <PackageReference Include="ChrisKaczor.Wpf.Windows.FloatingStatusWindow" Version="2.0.0.5" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
+    <PackageReference Include="Serilog" Version="4.0.1" />
+    <PackageReference Include="Serilog.Extensions.Logging" Version="8.0.0" />
+    <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
+    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
+    <PackageReference Include="Velopack" Version="0.0.626" />
   </ItemGroup>
   <ItemGroup>
     <Compile Update="Properties\Settings.Designer.cs">
@@ -28,4 +34,7 @@
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <None Include=".github\workflows\main.yml" />
+  </ItemGroup>
 </Project>