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Dockerfile
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####################################################################################################
## Builder
####################################################################################################
FROM rust:1.67.0-bullseye AS builder
RUN apt update && apt install -y libssl-dev pkg-config libz-dev libcurl4 postgresql
RUN update-ca-certificates
# Create appuser
ENV USER=bot
ENV UID=10001
RUN adduser \
--disabled-password \
--gecos "" \
--home "/nonexistent" \
--shell "/sbin/nologin" \
--no-create-home \
--uid "${UID}" \
"${USER}"
WORKDIR /bot
COPY ./ .
RUN cargo install cargo-cache
RUN cargo cache -a
RUN cargo install diesel_cli --no-default-features --features postgres
RUN cargo build --release
####################################################################################################
## Final image
####################################################################################################
FROM debian:bullseye-slim
RUN apt update && apt install -y postgresql
# Import from builder.
COPY --from=builder /etc/passwd /etc/passwd
COPY --from=builder /etc/group /etc/group
WORKDIR /bot
# Copy our build
COPY --from=builder /bot/target/release/weather_bot_rust ./
COPY --from=builder /bot/docker/start.sh ./
COPY --from=builder /usr/local/cargo/bin/diesel ./
COPY --from=builder /bot/migrations/ ./migrations/
# Use an unprivileged user.
USER bot:bot
CMD ["bash", "/bot/start.sh"]