✨ lgg xcell docker init

[dmiller15]

Description

Adding docker to run LGG XCELL analyses. This doesn't work yet because the source script is in a private repo.

Part of https://d3b.atlassian.net/browse/BIXU-4346

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Local testing
• Cavatica nextflow test: https://cavatica.sbgenomics.com/u/kfdrc-harmonization/kf-reference-pipeline/tasks/9c4e3c46-0df5-4532-8da9-b3e24b28aea9/#

Test Configuration:

• Environment:
• Test files:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings
• I have committed any related changes to the PR

[migbro]

Bonus point for adding a description