FROM rust:1-slim-bookworm AS builder
WORKDIR /app
RUN apt-get update && apt-get install -y --no-install-recommends build-essential pkg-config && rm -rf /var/lib/apt/lists/*

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

FROM debian:bookworm-slim
RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*
WORKDIR /app
COPY --from=builder /app/target/release/tssbot-backend ./tssbot-backend
EXPOSE 6000
CMD ["./tssbot-backend"]