floss: Pin debian version and rustup script

# Inherit from a recent Debian version. The slim version is a smaller variant

# meant for containers.

FROM debian:bookworm-slim

# This digest is taken from the tag debian:bookworm-slim (if you want to update)

FROM debian@sha256:b66f66d473ef3128436ba2812198edcae86c268eb530dff44ff6ae26f9a2ee30

# First install all required apt packages.

RUN apt-get update && \

    zlib1g-dev \

    ;

# Next install the Rust toolchain.

RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y

# Next install the Rust toolchain. Download the toolchain to the local folder

# using curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs

ADD rustup/rustup.sh /tmp

RUN /tmp/rustup.sh -y --default-toolchain 1.59.0

# Add .cargo/bin to $PATH

ENV PATH="/root/.cargo/bin:${PATH}"

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This is a locally downloaded copy of the Rustup script using:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs