add ad services and Docker configuration for web app

lib/widgets/ad_banner.dart

@@ -0,0 +1,75 @@
+import "package:flutter/foundation.dart" show kIsWeb;
+import "package:flutter/widgets.dart";
+import "package:shadcn_flutter/shadcn_flutter.dart";
+import "../services/ad_service.dart";
+import "../services/admob_service.dart";
+import "../services/adsense_service.dart";
+
+class AdBanner extends StatefulWidget {
+  const AdBanner({Key? key}) : super(key: key);
+
+  @override
+  State<AdBanner> createState() => _AdBannerState();
+}
+
+class _AdBannerState extends State<AdBanner> {
+  late AdService _adService;
+  bool _isLoading = true;
+
+  @override
+  void initState() {
+    super.initState();
+    _initializeAds();
+  }
+
+  Future<void> _initializeAds() async {
+    // Platform detection
+    if (kIsWeb) {
+      _adService = AdSenseService();
+    } else {
+      _adService = AdMobService();
+    }
+
+    try {
+      await _adService.initialize();
+      await _adService.loadBannerAd();
+    } catch (e) {
+      print("Error initializng ads: $e");
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isLoading = false;
+        });
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    _adService.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (_isLoading) {
+      return SizedBox(
+        height: 50,
+        child: Center(
+          child: SizedBox(
+            width: 20,
+            height: 20,
+            child: CircularProgressIndicator(strokeWidth: 2),
+          ),
+        ),
+      );
+    }
+
+    if (!_adService.isLoaded) {
+      // Ad failed to load, show nothing
+      return SizedBox.shrink();
+    }
+
+    return _adService.getBannerWidget();
+  }
+}