FROM nixos/nix:latest

WORKDIR /app
COPY . .

RUN mkdir -p ~/.config/nix && \
    echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf && \
    nix build .#app

# Extract the built binary
RUN cp -rL result/* /tmp/app/ || cp result /tmp/app/hello-world

# Use a minimal runtime image - no system dependencies needed!
FROM debian:bookworm-slim

# All functionality is in Rust crates, no need for system binaries
COPY --from=0 /tmp/app/ /usr/local/bin/

CMD ["/usr/local/bin/hello-world"]