Pass PYTHON_VERSION to miniconda

Author: hc2p

python/conda/Dockerfile.conda

@@ -16,6 +16,7 @@ ENV CONDA_ALWAYS_YES=true
 # We could instead download a specific miniconda3 version,
 # but that would require baking in the URLs for
 # different Miniconda installer versions into the Dockerfile.
+ARG PYTHON_VERSION
 RUN MINICONDA_URL="https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh"; \
     wget --quiet $MINICONDA_URL -O /tmp/miniconda.sh && \
     /bin/bash /tmp/miniconda.sh -b -p /opt/conda && \