added docker file which isn't working

issue is that readlinesync in docker is not reading anything from input.

Dockerfile

@@ -0,0 +1,27 @@
+# file from: https://hub.docker.com/_/dart/
+
+# Specify the Dart SDK base image version using dart:<version> (ex: dart:2.12)
+FROM dart:stable AS build
+
+RUN apt -y update && apt -y upgrade
+# Resolve app dependencies.
+WORKDIR /app
+COPY pubspec.* ./
+RUN dart pub get
+
+# Copy app source code and AOT compile it.
+COPY . .
+# Ensure packages are still up-to-date if anything has changed
+RUN dart pub get --offline
+RUN dart compile exe bin/helloworld.dart -o bin/helloworld
+
+# Build minimal serving image from AOT-compiled `/server` and required system
+# libraries and configuration files stored in `/runtime/` from the build stage.
+FROM scratch
+COPY --from=build /runtime/ /
+COPY --from=build /app/bin/helloworld /app/bin/
+
+
+CMD ["/app/bin/helloworld"]
+
+# CMD ["dart run /app/bin/nostr_console.dart "]

bin/helloworld.dart

@@ -0,0 +1,14 @@
+import 'dart:io';
+
+// file to show docker issue
+
+void main(List<String> arguments) async {
+  stdout.write("Enter your name, anon: ");
+
+  String? name = stdin.readLineSync();
+  if( name != null) {
+    print("Hello $name");
+  } else {
+    print("\nShould not print this if readlineSync works.");
+  }
+}