FROM rust:1.75-alpine AS builder
WORKDIR /app
COPY Cargo.toml Cargo.lock ./
RUN mkdir src && echo "fn main() {}" > src/main.rs
RUN cargo build --release
COPY src ./src
RUN cargo build --release
FROM alpine:3.19
COPY --from=builder /app/target/release/myapp /usr/local/bin/
ENTRYPOINT ["myapp"]