# Official Dart image: https://hub.docker.com/_/dart
# Specify the Dart SDK base image version using dart:<version> (ex: dart:2.12)
FROM dart:stable AS build

WORKDIR /app

# We explicitly disable workspace resolution and manually copy the pubspec.lock
# to retain the resolved dependency versions.
# See https://github.com/dart-lang/pub/issues/4594
RUN echo "resolution: null" > 'pubspec_overrides.yaml'

# Resolve app dependencies.
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/server.dart -o bin/server

# 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/server /app/bin/

# Start server.
EXPOSE 8080
CMD ["/app/bin/server"]