fix(containers): Install eccodes in icon container, use py3.12

containers/icon/Containerfile

@@ -1,20 +1,21 @@
-# Build a virtualenv using the appropriate Debian release
-# * Install python3-venv for the built-in Python3 venv module (not installed by default)
-# * Install gcc libpython3-dev to compile C Python modules
-# * In the virtualenv: Update pip setuputils and wheel to support building new packages
-FROM debian:11-slim AS build
-RUN apt-get update && \
-    apt-get install --no-install-suggests --no-install-recommends --yes python3-venv gcc libpython3-dev && \
-    python3 -m venv /venv && \
-    /venv/bin/pip install --upgrade pip setuptools wheel
+# Build a virtualenv using miniconda
+# * Install required compilation tools for wheels via apt
+# * Install required non-python binaries via conda
+FROM quay.io/condaforge/miniforge3:latest AS build-venv
+RUN apt -qq update && apt -qq install -y build-essential
+RUN conda create -p /venv python=3.12
+RUN /venv/bin/pip install --upgrade -q pip wheel setuptools
+RUN conda install -p /venv -q -y eccodes zarr
 
 # Build the virtualenv
-FROM build AS build-venv
-RUN /venv/bin/python -m pip install zarr xarray ocf_blosc2 huggingface_hub requests
+# * We don't want the bufr eccodes definitions so save space by deleting them
+FROM build-venv as install-reqs
+RUN /venv/bin/python -m pip install -q xarray ocf_blosc2 huggingface_hub requests
+RUN rm -r /venv/share/eccodes/definitions/bufr
 
 # Copy the virtualenv into a distroless image
 FROM gcr.io/distroless/python3-debian11
-COPY --from=build-venv /venv /venv
+COPY --from=install-reqs /venv /venv
 COPY . /app
 WORKDIR /app
 ENTRYPOINT ["/venv/bin/python3", "download_combine_upload_icon.py"]