fix dockerfile arch extra newlines

frontend/lib/screens/build_screen.dart

@@ -22,6 +22,7 @@ class _BuildScreenState extends State<BuildScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       body: APIBuilder<BuildProvider, Build, BuildDTO>(
+          key: const Key("Build on seperate page"),
           dto: BuildDTO(buildID: widget.buildID),
           interval: const Duration(seconds: 10),
           onLoad: () => const Text("loading"),

frontend/lib/screens/builds_screen.dart

@@ -31,6 +31,7 @@ class BuildsScreen extends StatelessWidget {
                 SizedBox(
                   width: double.infinity,
                   child: APIBuilder<BuildsProvider, List<Build>, Object>(
+                      key: const Key("Builds on seperate screen"),
                       interval: const Duration(seconds: 10),
                       onLoad: () => const Text("no data"),
                       onData: (data) {