docs/dart/content.md

What is Dart?

Dart is a client-optimized language for developing fast apps on any platform. Its goal is to offer the most productive programming language for multi-platform development, paired with a flexible execution runtime platform for app frameworks. For more details, see https://dart.dev.

By utilizing Dart's support for ahead-of-time (AOT) compilation to executables, you can create very small runtime images (~10 MB).

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Using this image

We recommend creating small runtime images by leveraging Dart's support for ahead-of-time (AOT) compilation to executables. This enables creating small runtime images (~10 MB).

The following Dockerfile performs two steps:

1. Using the Dart SDK in the dart:stable image, compiles your server (bin/server.dart) to an executable (server).

2. Assembles the runtime image by combining the compiled server with the Dart VM runtime and it's needed dependencies located in /runtime/.

# Specify the Dart SDK base image version using dart:<version> (ex: dart:2.12)
FROM dart:stable AS build

# Resolve app dependencies.
WORKDIR /app
COPY pubspec.* .
RUN dart pub get

# Copy app source code and AOT compile it.
COPY . .
RUN dart compile exe bin/server.dart -o /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 /server /bin/

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

If you have Docker Desktop installed, you can build and run on your machine with the docker command:

$ docker build -t dart-server .
$ docker run -it --rm -p 8080:8080 --name myserver dart-server

When finished, you can stop the container using the name you provided:

$ docker kill myserver

Maintained with ❤️ by the Dart team.