Docker usage

[piccaso]

I'm looking for a way to make a small docker image, similar to what you can do in go with static compilation.
But I want to use --stdlib:dotnet and make it as small as possible.

I got --stdlib:zero to work but its no where near the 4kB (whole image is 4.3MB):

FROM bitnami/minideb AS builder
RUN apt-get update && apt-get install -y wget libc++1-13

ARG BFLAT_VERSION=8.0.2
WORKDIR /opt/bflat
RUN wget -O- https://github.com/bflattened/bflat/releases/download/v${BFLAT_VERSION}/bflat-${BFLAT_VERSION}-linux-glibc-x64.tar.gz | tar -xzvf-
ENV PATH="$PATH:/opt/bflat"

WORKDIR /src
RUN echo 'System.Console.WriteLine("Hello bflat");' > hello.cs
RUN bflat build --stdlib:zero hello.cs

FROM busybox:glibc
COPY --from=builder /src/hello /hello
CMD /hello

Does anyone know how to make this work?
Or knows any Projects or Examples out there.

Thx