try new container build

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/Dockerfile

@@ -8,7 +8,8 @@ RUN dart pub get
 
 # Copy app source code (except anything in .dockerignore) and AOT compile app.
 COPY . .
-RUN APP_VERSION=$(awk '/^version:/{print $2}' pubspec.yaml) && \
+RUN dart run build_runner build --delete-conflicting-outputs && \
+    APP_VERSION=$(grep 'version:' pubspec.yaml | sed 's/version: //') && \
     dart compile exe bin/server.dart -o bin/server \
     -DAPP_VERSION=$APP_VERSION