feat(docker): new dockerfile (#18)

Author: rswanson

Dockerfile

@@ -1,11 +1,37 @@
-FROM arm64v8/ubuntu:latest
+# syntax=docker/dockerfile:1.7-labs
+### STAGE 0: Create base chef image for building
+### cargo chef is used to speed up the build process by caching dependencies using docker
+FROM --platform=$TARGETPLATFORM lukemathwalker/cargo-chef:latest-rust-latest as chef
 
-RUN apt-get update && apt-get install -y curl unzip
-RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-aarch64.zip" -o "awscliv2.zip"
-RUN unzip awscliv2.zip
-RUN ./aws/install
+RUN cargo install cargo-chef
 
-COPY target/aarch64-unknown-linux-gnu/release/zenith-builder-example /usr/local/bin/zenith-builder-example
+WORKDIR /app
 
-# Run the server
-CMD ["/usr/local/bin/zenith-builder-example"]
+### Stage 1: cargo chef prepare
+### Creates the recipe.json file which is a manifest of Cargo.toml files and 
+### the relevant Cargo.lock file
+FROM chef as planner
+COPY --exclude=target . .
+RUN cargo chef prepare
+
+### Stage 2: Build the project
+### This stage builds the deps of the project (not the code) using cargo chef cook
+### and then it copies the source code and builds the actual crates
+### this takes advantage of docker layer caching to the max
+FROM chef as builder
+COPY --from=planner /app/recipe.json recipe.json
+RUN apt-get update && apt-get -y upgrade && apt-get install -y gcc libclang-dev pkg-config libssl-dev
+RUN rustup target add x86_64-unknown-linux-gnu 
+RUN rustup toolchain install stable-x86_64-unknown-linux-gnu
+
+RUN cargo chef cook --release --target x86_64-unknown-linux-gnu --recipe-path recipe.json --bin zenith-builder-example 
+COPY --exclude=target . .
+
+RUN cargo build --release --target x86_64-unknown-linux-gnu --bin zenith-builder-example
+
+# Stage 3: Final image for running in the env
+FROM --platform=$TARGETPLATFORM debian:bookworm-slim
+
+COPY --from=builder /app/target/x86_64-unknown-linux-gnu/release/zenith-builder-example /usr/local/bin/zenith-builder-example
+
+ENTRYPOINT [ "/usr/local/bin/zenith-builder-example" ]