Bulk upload functionality implementation progressing.

Description

Types of changes

[ ] I have read the CONTRIBUTING doc
[ ] I have checked that unit tests pass locally with my changes
[ ] I have run the npm script lint on the frontend and backend
[ ] I have added tests that prove my fix is effective or that my feature works
[ ] I have added necessary documentation (if appropriate)
[ ] I have approval from the product owner for the contribution in this pull request