download conda-forge's conda installer that is configured to only use…

… the conda-forge channel to avoid licensing issues with Anaconda -- using an explicit version instead of 'latest' for reproducibility and so we can easily track which version was used

internal/scripts/docker_env/Dockerfile.conda

@@ -5,6 +5,6 @@ ARG DEBIAN_VERSION=12
 FROM debian:${DEBIAN_VERSION}-slim
 
 RUN apt update && apt install -y curl \
- && curl https://repo.anaconda.com/miniconda/Miniconda3-py311_23.5.2-0-Linux-x86_64.sh > /miniconda.sh \
- && bash /miniconda.sh -b -p /usr/local/conda \
+ && curl -L https://github.com/conda-forge/miniforge/releases/download/23.3.1-1/Mambaforge-23.3.1-1-$(uname)-$(uname -m).sh -o /miniforge.sh \
+ && bash /miniforge.sh -b -p /usr/local/conda \
  && /usr/local/conda/bin/conda update -y -n base -c conda-forge conda