code sharing sample: flat package directory (#1486)

code_sharing/Dockerfile

@@ -0,0 +1,26 @@
+# Use latest stable channel SDK.
+FROM dart:stable AS build
+
+# Copy shared code.
+WORKDIR /shared
+COPY /shared/. .
+
+# Copy server code.
+WORKDIR /server
+COPY /server/. .
+
+# Resolve app dependencies.
+RUN dart pub get
+
+# AOT compile app.
+RUN dart compile exe bin/server.dart -o bin/server
+
+# Build minimal serving image from AOT-compiled `/server`
+# and the pre-built AOT-runtime in the `/runtime/` directory of the base image.
+FROM scratch
+COPY --from=build /runtime/ /
+COPY --from=build /server/bin/server /app/bin/
+
+# Start server.
+EXPOSE 8080
+CMD ["/app/bin/server"]