feat: add Docker support, refactor DB layer, update API responses

bin/server.dart

@@ -21,8 +21,8 @@ void main(List<String> args) async {
   final geoRoutes = GeoRoutes(database);
 
   final router = Router()
-    ..mount('', authRoutes.routes.call)
-    ..mount('', geoRoutes.routes.call)
+    ..mount('/', authRoutes.routes.call)
+    ..mount('/', geoRoutes.routes.call)
     ..get('/', (Request req) => Response.ok('Family Safety Tracker API\n'));
 
   final handler = Pipeline()
@@ -30,7 +30,7 @@ void main(List<String> args) async {
       .addHandler(router.call);
 
   final ip = InternetAddress.anyIPv4;
-  final port = int.parse(Platform.environment['PORT'] ?? '8080');
+  final port = int.parse(Platform.environment['PORT'] ?? '9090');
   final server = await serve(handler, ip, port);
   print('Server listening on port ${server.port}');
 }