feat: simple shelf server and Docker

packages/shorebird_code_push_api/.dockerignore

@@ -0,0 +1,9 @@
+.dockerignore
+Dockerfile
+build/
+.dart_tool/
+.git/
+.github/
+.gitignore
+.idea/
+.packages

packages/shorebird_code_push_api/Dockerfile

@@ -0,0 +1,27 @@
+# Official Dart image: https://hub.docker.com/_/dart
+# Specify the Dart SDK base image version using dart:<version> (ex: dart:2.19)
+FROM dart:stable AS build
+
+# Resolve app dependencies.
+WORKDIR /app
+
+# package:shorebird_code_push_api
+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"]

packages/shorebird_code_push_api/bin/server.dart

@@ -0,0 +1,20 @@
+import 'dart:io';
+
+import 'package:shelf/shelf.dart';
+import 'package:shelf/shelf_io.dart' as shelf_io;
+import 'package:shelf_router/shelf_router.dart' as shelf_router;
+
+Future<void> main() async {
+  final port = int.parse(Platform.environment['PORT'] ?? '8080');
+  final router = shelf_router.Router()
+    ..all('/', (_) => Response.ok('Hello, world!'));
+
+  final server = await shelf_io.serve(
+    logRequests().addHandler(router.call),
+    InternetAddress.anyIPv6,
+    port,
+  );
+
+  // ignore: avoid_print
+  print('Serving at http://${server.address.host}:${server.port}');
+}

packages/shorebird_code_push_api/pubspec.yaml

@@ -6,6 +6,10 @@ publish_to: none
 environment:
   sdk: ">=2.19.0 <3.0.0"
 
+dependencies:
+  shelf: ^1.4.0
+  shelf_router: ^1.1.3
+
 dev_dependencies:
   mocktail: ^0.3.0
   test: ^1.19.2