# Multi-stage build for Corrosion API
# Stage 1: Build the Rust binary
FROM rust:1.85-alpine AS builder

RUN apk add --no-cache musl-dev pkgconfig openssl-dev openssl-libs-static

WORKDIR /build

# Cache dependencies — copy manifests first
COPY Cargo.toml ./
COPY Cargo.lock* ./
RUN mkdir src && echo "fn main() {}" > src/main.rs
RUN cargo build --release 2>/dev/null || true

# Now copy actual source and build
COPY src/ src/
COPY migrations/ migrations/
RUN touch src/main.rs && cargo build --release

# Stage 2: Runtime image
FROM alpine:3.20

RUN apk add --no-cache ca-certificates

WORKDIR /app

COPY --from=builder /build/target/release/corrosion-api .
COPY migrations/ migrations/

ENV RUST_LOG=corrosion_api=info,tower_http=info

EXPOSE 3000

CMD ["./corrosion-api"]