Updates rust in docker. Pins circom-compat to pinned FFI branch (#818)

* Updates rust in docker. Pins circom-compat to pinned FFI branch

* Extracts builder image from codex.Dockerfile

* Updates readme

* Use single Dockerfile

* Revert readme back

---------

Co-authored-by: Veaceslav Doina <[email protected]>

Author: benbierens

docker/README.md

@@ -47,7 +47,7 @@
 
 
 ## Slim
- 1. Build the image using `docker build -t status-im/codexsetup:latest -f codex.Dockerfile ..`
+ 1. Build the image using `docker build -t codexstorage/codexsetup:latest -f codex.Dockerfile ..`
  2. The docker image can then be minified using [slim](https://github.com/slimtoolkit/slim). Install slim on your path and then run:
     ```shell
     slim # brings up interactive prompt

docker/codex.Dockerfile

@@ -1,6 +1,7 @@
 # Variables
-ARG BUILDER=ubuntu:22.04
+ARG BUILDER=ubuntu:24.04
 ARG IMAGE=${BUILDER}
+ARG RUST_VERSION=${RUST_VERSION:-1.78.0}
 ARG BUILD_HOME=/src
 ARG MAKE_PARALLEL=${MAKE_PARALLEL:-4}
 ARG NIMFLAGS="${NIMFLAGS:-"-d:disableMarchNative"}"
@@ -9,11 +10,17 @@ ARG NAT_IP_AUTO=${NAT_IP_AUTO:-false}
 
 # Build
 FROM ${BUILDER} AS builder
+ARG RUST_VERSION
 ARG BUILD_HOME
 ARG MAKE_PARALLEL
 ARG NIMFLAGS
 
-RUN apt-get update && apt-get install -y git cmake curl make bash lcov build-essential rustc cargo
+RUN apt-get update && apt-get install -y git cmake curl make bash lcov build-essential
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs/ | sh -s -- --default-toolchain=${RUST_VERSION} -y
+
+SHELL ["/bin/bash", "-c"]
+ENV BASH_ENV="/etc/bash_env"
+RUN echo "export PATH=$PATH:$HOME/.cargo/bin" >> $BASH_ENV
 
 WORKDIR ${BUILD_HOME}
 COPY . .
@@ -29,8 +36,8 @@ ARG NAT_IP_AUTO
 
 WORKDIR ${APP_HOME}
 COPY --from=builder ${BUILD_HOME}/build/codex /usr/local/bin
-COPY --chmod=0755 docker/docker-entrypoint.sh /
-COPY ./openapi.yaml .
+COPY --from=builder ${BUILD_HOME}/openapi.yaml .
+COPY --from=builder --chmod=0755 ${BUILD_HOME}/docker/docker-entrypoint.sh /
 RUN apt-get update && apt-get install -y libgomp1 bash curl jq && rm -rf /var/lib/apt/lists/*
 ENV NAT_IP_AUTO=${NAT_IP_AUTO}
 ENTRYPOINT ["/docker-entrypoint.sh"]