minimal rust dockerfile

Dockerfile

# syntax = docker/dockerfile:experimental

# Replace `THE_PROGRAM` with the name of your binary

FROM rust:1.75 as builder

RUN useradd -m rust

ENV HOME /home/rust

RUN mkdir -p $HOME/app
RUN mkdir -p $HOME/app/target
RUN mkdir -p $HOME/binaries
RUN chown rust:rust -R $HOME

COPY Cargo.lock $HOME/app/Cargo.lock

RUN cargo init $HOME/app
COPY Cargo.toml $HOME/app/Cargo.toml

WORKDIR $HOME/app

RUN --mount=type=cache,target=/home/rust/.cargo/git \
    --mount=type=cache,target=/home/rust/.cargo/registry \
    cargo build --release

COPY src $HOME/app/src

RUN --mount=type=cache,sharing=private,target=/home/rust/app/target \
    cargo install --path . && \
    cp $HOME/app/target/release/THE_PROGRAM $HOME/binaries

FROM debian:bookworm-slim as runtime

RUN apt-get update && \
    apt-get install -y ca-certificates && \
    update-ca-certificates && \
    rm -rf /var/lib/apt/lists/*

COPY --from=builder /home/rust/binaries/THE_PROGRAM /usr/local/bin/THE_PROGRAM

CMD RUST_BACKTRACE=full THE_PROGRAM