🌎 updated file ids to public versions

[dmiller15]

Description

This PR updates the file ids in the public app to point to publicly available files. It also adds a picture of the workflow to the readme.

Relates to https://github.com/d3b-center/bixu-tracker/issues/793

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

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

• [x] Tested pulling of files in an unaffiliated project: https://cavatica.sbgenomics.com/u/aheath/test-project/tasks/4e5908f7-aaa8-4249-9b2f-9fa6b4b96b28/#set-input-data

Test Configuration:

• Environment: Cavatica
• Test files: none

Checklist:

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