add ad services and Docker configuration for web app

lib/services/admob_service.dart

@@ -0,0 +1,73 @@
+import "package:flutter/foundation.dart";
+import "package:flutter/widgets.dart";
+import "package:google_mobile_ads/google_mobile_ads.dart";
+import "ad_service.dart";
+
+class AdMobService implements AdService {
+  BannerAd? _bannerAd;
+  bool _isLoaded = false;
+
+  // Ad unit IDs
+  static const String _androidBannerAdUnitId = "ca-app-pub-5177609929140951/8415596856";
+  static const String _iosBannerAdUnitId = "ca-app-pub-5177609929140951/7102515188";
+
+  String get _bannerAdUnitId {
+    if (defaultTargetPlatform == TargetPlatform.android) {
+      return _androidBannerAdUnitId;
+    } else if (defaultTargetPlatform == TargetPlatform.iOS) {
+      return _iosBannerAdUnitId;
+    } else {
+      throw UnsupportedError("Platform not supported");
+    }
+  }
+
+  @override
+  Future<void> initialize() async {
+    await MobileAds.instance.initialize();
+    print("AdMob initialized");
+  }
+
+  @override
+  Future<void> loadBannerAd() async {
+    _bannerAd = BannerAd(
+      adUnitId: _bannerAdUnitId,
+      size: AdSize.banner,
+      request: const AdRequest(),
+      listener: BannerAdListener(
+        onAdLoaded: (ad) {
+          print("Banner ad loaded");
+          _isLoaded = true;
+        },
+        onAdFailedToLoad: (ad, error) {
+          print("Banner ad failed to load: $error");
+          ad.dispose();
+          _isLoaded = false;
+        },
+      ),
+    );
+
+    await _bannerAd!.load();
+  }
+
+  @override
+  Widget getBannerWidget() {
+    if (_bannerAd == null || !_isLoaded) {
+      return SizedBox.shrink();
+    }
+
+    return SizedBox(
+      height: 50,
+      child: AdWidget(ad: _bannerAd!),
+    );
+  }
+
+  @override
+  void dispose() {
+    _bannerAd?.dispose();
+    _bannerAd = null;
+    _isLoaded = false;
+  }
+
+  @override
+  bool get isLoaded => _isLoaded;
+}