dev: fix Dockerfile installing of dependencies

Avoid the build failing due to an interactive prompt.

.github/workflows/docker.yml

@@ -48,6 +48,7 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -21,7 +21,7 @@ RUN stack install
 
 FROM debian:stable-slim
 
-RUN apt-get update && apt-get install libtinfo5 libgmp10 && rm -rf /var/lib/apt/lists
+RUN apt-get update && apt-get -y install libtinfo5 libgmp10 && rm -rf /var/lib/apt/lists
 
 COPY --from=dev /root/.local/bin/hledger* /usr/bin/