feat(dockerfile): Improve size and layering

.dockerignore

@@ -1,8 +1,5 @@
 .env
-.dockerignore
-spec.yaml
 target/
-deploy/
 tests/
 Dockerfile
 scripts/

Dockerfile

@@ -1,9 +1,30 @@
-FROM rust:1.71.0
+FROM lukemathwalker/cargo-chef:latest-rust-1.71 as chef
+
 WORKDIR /app
 RUN apt update && apt install lld clang -y
+
+FROM chef as planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef as builder
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json
 COPY . .
 ENV SQLX_OFFLINE true
-RUN cargo build --release
+RUN cargo build --release --bin zero2prod
+
+
+FROM debian:bullseye-slim AS runtime
+
+WORKDIR /app
+RUN apt-get update -y \
+    && apt-get install -y --no-install-recommends openssl ca-certificates \
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
+COPY --from=builder /app/target/release/zero2prod zero2prod
+COPY configuration configuration
 ENV APP_ENVIRONMENT production
 
-ENTRYPOINT ["./target/release/zero2prod"]
+ENTRYPOINT ["./zero2prod"]