Implemented update functionallity

UpdateWorker.cs

@@ -0,0 +1,58 @@
+using System.Diagnostics;
+
+namespace ServiceUpdater;
+
+public sealed class UpdateWorker(UpdaterConfig config) {
+    public async IAsyncEnumerable<string> UpdateService(string serviceName) {
+        yield return $"Starting update for {serviceName}";
+
+        await foreach (var line in RunProcess(serviceName, "compose pull")) {
+            yield return line;
+        }
+
+        yield return $"Downloaded changes for {serviceName}";
+
+        await foreach (var line in RunProcess(serviceName, "compose up -d --remove-orphans")) {
+            yield return line;
+        }
+
+        yield return $"Successfully updated {serviceName}";
+    }
+
+    private async IAsyncEnumerable<string> RunProcess(string folder, string arguments) {
+        var process = new Process {
+            StartInfo = new() {
+                FileName = "docker",
+                Arguments = arguments,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false,
+                WorkingDirectory = Path.Combine(config.ServicesRoot, folder)
+            }
+        };
+
+        process.Start();
+
+        var output = process.StandardOutput.ReadLineAsync();
+        var error = process.StandardError.ReadLineAsync();
+
+        while (true) {
+            var completed = await Task.WhenAny(output, error);
+
+            if (completed == output) {
+                var line = await output;
+                if (line == null) break;
+                yield return line;
+                output = process.StandardOutput.ReadLineAsync();
+            }
+            else {
+                var line = await error;
+                if (line == null) break;
+                yield return "[ERR] " + line;
+                error = process.StandardError.ReadLineAsync();
+            }
+        }
+
+        await process.WaitForExitAsync();
+    }
+}