FROM rust:alpine AS builder
RUN apk add --no-cache musl-dev musl-utils gcc

WORKDIR /usr/src/app

ENV RUSTFLAGS="-C target-feature=+crt-static"
COPY Cargo.toml Cargo.lock ./
COPY src ./src
RUN --mount=type=cache,target=/usr/local/cargo/registry \
    --mount=type=cache,target=/usr/local/cargo/git \
    rustup target add x86_64-unknown-linux-musl \
    && cargo fetch --locked --target x86_64-unknown-linux-musl

RUN --mount=type=cache,target=/usr/local/cargo/registry \
    --mount=type=cache,target=/usr/local/cargo/git \
    cargo build --release --target x86_64-unknown-linux-musl

FROM alpine:latest
RUN apk add --no-cache libgcc
COPY --from=builder /usr/src/app/target/x86_64-unknown-linux-musl/release/nostr-relay /usr/local/bin/
CMD ["nostr-relay"]