rust-build-Dockerfile

# source: https://t.me/rustlang_ru/368839

FROM debian:buster-slim AS base
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        libpq5 \
    && rm -rf /var/lib/apt/lists/*
WORKDIR /app
EXPOSE 8081

FROM rust:1.49.0-buster AS build
WORKDIR /usr/src/app
RUN USER=root cargo init
COPY ./Cargo.toml .
COPY ./Cargo.lock .
RUN cargo build --release
COPY ./src ./src
COPY ./resources ./resources
# https://users.rust-lang.org/t/dockerfile-with-cached-dependencies-does-not-recompile-the-main-rs-file/21577
RUN touch src/main.rs && cargo build --release

FROM base AS final
WORKDIR /app
COPY --from=build /usr/src/app/target/release/demo-api .
COPY --from=build /usr/src/app/resources/static ./resources/static
ENV RUST_BACKTRACE=full
ENTRYPOINT ["/app/demo-api"]