add missing Docker files and shell scripts

[saranshkr]

Issue #300

Task	Status	Assignee
1. Update docker system	Done ✅	@saranshkr
2. Add test files with hunit_test	Not started
3. Merge notes from tutorials/TorchRL_MAC/notes_to_merge.md into the notebooks	Done ✅	@Ay2012
4. Add missing files as indicated in class_project/project_template	Not started