FROM rust:1.88-slim AS builder

WORKDIR /app

COPY Cargo.toml Cargo.lock ./
RUN mkdir src && echo "fn main() {}" > src/main.rs && cargo build --release && rm -rf src

COPY src ./src
RUN touch src/main.rs && cargo build --release --locked

FROM debian:bookworm-slim

COPY --from=builder /app/target/release/upvoters /usr/local/bin/upvoters

CMD ["upvoters"]