Cell Ranger is a commercial tool from 10X Genomics. The container provided for the cellranger nf-core module is not provided nor supported by 10x Genomics. Updating the Cell Ranger versions in the container and pushing the update to Dockerhub needs to be done manually.
1. Navigate to the appropriate download page. - [Cell Ranger](https://support.10xgenomics.com/single-cell-gene-expression/software/downloads/latest): download the tar ball of the desired Cell Ranger version with `curl` or `wget`. Place this file in the same folder where the Dockerfile lies.