Fix to use cargo-chef

Dockerfile

@@ -1,17 +1,23 @@
-FROM rust:1.77-alpine as builder
-
-WORKDIR /usr/src/genuuid
+FROM rust:1.77-alpine AS chef
 RUN apk update && apk add --no-cache musl-dev
-COPY ./Cargo.lock ./Cargo.lock
-COPY ./Cargo.toml ./Cargo.toml
-RUN mkdir src/
-RUN touch src/lib.rs
-RUN cargo build --release --target=x86_64-unknown-linux-musl
+WORKDIR /app
+RUN cargo install cargo-chef --locked
+
+FROM chef AS planner
 COPY . .
-RUN cargo install --path . --target=x86_64-unknown-linux-musl
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS cacher
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --recipe-path recipe.json --release --target=x86_64-unknown-linux-musl
+
+FROM chef AS builder
+COPY . .
+COPY --from=cacher /app/target target
+RUN cargo build --release --target=x86_64-unknown-linux-musl
 
 FROM scratch
 LABEL org.opencontainers.image.source https://github.com/bouzuya/genuuid
 ENV PORT=8080
-COPY --from=builder /usr/local/cargo/bin/genuuid /usr/local/bin/genuuid
+COPY --from=builder /app/target/x86_64-unknown-linux-musl/release/genuuid /usr/local/bin/genuuid
 ENTRYPOINT ["genuuid"]