Implemented the SampleAppParameters type in the sample app target, and integrated it to the SampleApp type.

Samples/DocCMiddleware/Parameters/SampleAppParameters.swift

@@ -0,0 +1,37 @@
+// ===----------------------------------------------------------------------===
+//
+// This source file is part of the Hummingbird DocC Middleware open source project
+//
+// Copyright (c) 2025 Röck+Cöde VoF. and the Hummingbird DocC Middleware project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of Hummingbird DocC Middleware project authors
+//
+// ===----------------------------------------------------------------------===
+
+import protocol ArgumentParser.ParsableArguments
+
+import struct ArgumentParser.Option
+
+extension SampleApp {
+    /// A type that conforms to the `ParsableArguments` protocol, which contains the input parameters required for the execution of the sample executable.
+    struct Parameters: ParsableArguments {
+        
+        // MARK: Properties
+
+        /// A label given to the sample app to identify it within a communications channel.
+        @Option(
+            name: .shortAndLong,
+            help: "A label given to the sample app for the sole purpose of identification within a communications channel."
+        )
+        var hostname: String = "127.0.0.1"
+    
+        /// A port number assigned to the sample app from where the app either sends or receives data.
+        @Option(
+            name: .shortAndLong,
+            help: "A port number assigned to the sample app from where the app either sends or receives data."
+        )
+        var port: Int = 8080
+    }
+}

Samples/DocCMiddleware/SampleApp.swift

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+// ===----------------------------------------------------------------------===
+//
+// This source file is part of the Hummingbird DocC Middleware open source project
+//
+// Copyright (c) 2025 Röck+Cöde VoF. and the Hummingbird DocC Middleware project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of Hummingbird DocC Middleware project authors
+//
+// ===----------------------------------------------------------------------===
+
+import struct ArgumentParser.OptionGroup
+
+/// A type that implements and runs the sample executable that showcases the `Hummingbird-DocC` middleware.
+@main struct SampleApp {
+    
+    // MARK: Properties
+    
+    /// A type that contains all the necessary input parameters to run the sample executable.
+    @OptionGroup var parameters: Parameters
+
+}
+