Consider offering a binary only docker image

Nobody has claimed this yet.

While I understand the convenience of shipping docker images based on the upstream rust images, it does make ensuring that the right images are used in this era of supply chain attacks more difficult. Would you consider shipping a minimal docker image that only contains the `cargo-chef` binary, to be explicitly copied into some other potentially hardened build images provided by a third party using something like

`COPY --from=LukeMathWalker/cargo-chef:bin-only /cargo-chef /bin/cargo-chef`

I have experimented with the following and it seems to work

```Dockerfile
FROM rust:slim-trixie AS build

WORKDIR /build
COPY . .
RUN cargo build --release

FROM scratch
COPY --from=build /build/target/release/cargo-chef /cargo-chef
```

Start by locating the repository's existing Docker build and image-publishing configuration, then compare it with the proposed Dockerfile. Done means a minimal bin-only image publishes the cargo-chef binary at /cargo-chef and supports the demonstrated COPY --from usage.

Written by the indexing model from the issue text.