Docker image building seems to run indefinitely on extern dockerfiles

[rguilloteau]

Describe the bug
The Docker image building phase seems to be blocked indefinitely when I run tern on an extern Dockerfile. I interrupted the software after 5min.

To Reproduce
Steps to reproduce the behavior:

romain$ cp tern/samples/photon_git/Dockerfile .
romain$ tern report -d Dockerfile
2023-12-11 14:55:14,758 - DEBUG - __main__ - Starting...
2023-12-11 14:55:14,758 - DEBUG - prep - Setting up...
2023-12-11 14:55:14,801 - DEBUG - rootfs - Running command: sudo chmod +x /home/viveris/.local/lib/python3.10/site-packages/tern/tools/fs_hash.sh
2023-12-11 14:55:14,805 - DEBUG - run - Parsing Dockerfile...
2023-12-11 14:55:14,806 - DEBUG - run - Building Docker image with Dockerfile: Dockerfile

Error in terminal

No error just a blocked software

Expected behavior
I expect a SBOM ouput in ther terminal. The same as when I ran the example with this command

tern report -d samples/photon_git/Dockerfile

Environment you are running Tern on
Enter all that apply

• Tern version 2.12.1
• Linux Mint 21.2
• 3.10.12