Dockerfile

# https://shaneutt.com/blog/rust-fast-small-docker-image-builds/

FROM rustlang/rust:nightly-slim as cargo-build

RUN apt-get update

RUN apt-get install musl-tools -y

RUN rustup target add x86_64-unknown-linux-musl

WORKDIR /usr/src/myapp

COPY Cargo.toml Cargo.toml

RUN mkdir src/

RUN echo "fn main() {println!(\"if you see this, the build broke\")}" > src/main.rs

RUN RUSTFLAGS=-Clinker=musl-gcc cargo build --release --target=x86_64-unknown-linux-musl

RUN rm -f target/x86_64-unknown-linux-musl/release/deps/myapp*

COPY . .

RUN RUSTFLAGS=-Clinker=musl-gcc cargo build --release --target=x86_64-unknown-linux-musl

# ------------------------------------------------------------------------------
# Final Stage
# ------------------------------------------------------------------------------

FROM mhart/alpine-node:latest

RUN addgroup -g 1000 myapp

RUN adduser -D -s /bin/sh -u 1000 -G myapp myapp

WORKDIR /home/myapp/bin/

COPY --from=cargo-build /usr/src/myapp/target/x86_64-unknown-linux-musl/release/code-runner-rust .

RUN chown myapp:myapp -R code-runner-rust && chmod 777 /tmp

USER myapp

CMD ["./code-runner-rust"]