added multistage docker build for final executable

Dockerfile

@@ -0,0 +1,39 @@
+FROM rust:1.91.1-slim AS chef
+
+RUN apt-get update && \
+    apt-get install -y musl-tools pkg-config build-essential libssl-dev && \
+    rustup target add x86_64-unknown-linux-musl && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN cargo install cargo-chef && \
+    cargo install sccache
+
+ENV RUSTC_WRAPPER=sccache \
+    SCCACHE_DIR=/sccache
+
+WORKDIR /enginewhy
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+COPY --from=planner /enginewhy/recipe.json recipe.json
+
+RUN --mount=type=cache,target=/usr/local/cargo/registry \
+    --mount=type=cache,target=/usr/local/cargo/git \
+    --mount=type=cache,target=$SCCACHE_DIR,sharing=locked \
+    cargo chef cook --release --target x86_64-unknown-linux-musl --recipe-path recipe.json
+
+COPY . .
+RUN --mount=type=cache,target=/usr/local/cargo/registry \
+    --mount=type=cache,target=/usr/local/cargo/git \
+    --mount=type=cache,target=$SCCACHE_DIR,sharing=locked \
+    cargo build --release --target x86_64-unknown-linux-musl
+
+# change to scratch and get comment the apk command for prod, i guess
+FROM alpine:latest AS runtime
+# RUN apk add --no-cache ca-certificates curl netcat-openbsd bind-tools strace
+WORKDIR /enginewhy
+COPY --from=builder /enginewhy/target/x86_64-unknown-linux-musl/release/l4lb /usr/bin/l4lb
+ENTRYPOINT ["l4lb"]