add ad services and Docker configuration for web app

lib/services/adsense_service_web.dart

@@ -0,0 +1,80 @@
+import "dart:ui_web" as ui_web;
+import "dart:js" as js;
+import "package:flutter/widgets.dart";
+import "package:universal_html/html.dart" as html;
+import "ad_service.dart";
+
+/// Web implementation of AdSense service
+class AdSenseService implements AdService {
+  bool _isLoaded = false;
+  static const String _adSlotId = "XXXXXXXXXX"; // Replace with your ad slot ID
+
+  @override
+  Future<void> initialize() async {
+    // AdSense is loaded via script tag in index.html
+    print("AdSense initialized (web)");
+    _isLoaded = true;
+  }
+
+  @override
+  Future<void> loadBannerAd() async {
+    // AdSense ads are loaded automatically when widget renders
+    _isLoaded = true;
+  }
+
+  @override
+  Widget getBannerWidget() {
+    final viewType = "adsense-banner-${DateTime.now().millisecondsSinceEpoch}";
+
+    // Register the view factory
+    // ignore: undefined_prefixed_name
+    ui_web.platformViewRegistry.registerViewFactory(
+      viewType,
+      (int viewId) => _createAdElement(),
+    );
+
+    return SizedBox(
+      height: 90,
+      child: HtmlElementView(viewType: viewType),
+    );
+  }
+
+  html.Element _createAdElement() {
+    // Create AdSense div
+    final adContainer = html.DivElement()
+      ..style.width = "100%"
+      ..style.height = "90px"
+      ..style.textAlign = "center";
+
+    final adElement = html.Element.html("""
+      <ins class="adsbygoogle"
+           style="display:block"
+           data-ad-client="ca-pub-XXXXXXXXXXXXXXXX"
+           data-ad-slot="$_adSlotId"
+           data-ad-format="auto"
+           data-full-width-responsive="true"></ins>
+    """);
+
+    adContainer.append(adElement);
+
+    // Push ad using dart:js instead of eval
+    try {
+      final adsbygoogle = js.context["adsbygoogle"];
+      if (adsbygoogle != null) {
+        adsbygoogle.callMethod("push", [js.JsObject.jsify({})]);
+      }
+    } catch (e) {
+      print("Error pushing AdSense ad: $e");
+    }
+
+    return adContainer;
+  }
+
+  @override
+  void dispose() {
+    _isLoaded = false;
+  }
+
+  @override
+  bool get isLoaded => _isLoaded;
+}