Cannot use domain without tld as INVENTREE_SITE_URL

[tounho]

Please verify that this bug has NOT been raised before.

• I checked and didn't find a similar issue

Describe the bug*

When using a domain name without a tld like http://inventree/ as INVENTREE_SITE_URL, I get the following error.

inventree-worker  | 2026-02-03 14:40:48,526 ERROR {'event': "Invalid SITE_URL value: 'http://inventree'. InvenTree server cannot start.", 'timestamp': '2026-02-03T14:40:48.525995Z', 'logger': 'inventree', 'level': 'error'}
inventree-worker  | Invalid SITE_URL value: 'http://inventree'. InvenTree server cannot start.
inventree-worker  | ERROR: InvenTree command failed: 'python3 manage.py wait_for_db'
inventree-worker  | - Refer to the error messages in the log above for more information
inventree-worker exited with code 255 (restarting)

As I can far as see the error is thrown settings.py line 1098.

There is a related issue #5585 closed with #5615 but the BaseURLValidator(URLValidator) is not used in settings.py.

#1297 and #5577 might be related too.

I don't know if this is maybe a django issue, not an InvenTree issue

Steps to Reproduce

Using the official docker compose and
INVENTREE_SITE_URL="http://inventree/"
in .env

Expected behaviour

For InvenTree to accept a single-word domain without TLD

Deployment Method

Docker

Version Information

Screenshot since the Copy version information button does not do anything and I cannot select most of the dialog.

Try to reproduce on the demo site

I did not try to reproduce

Is the bug reproducible on the demo site?

Not reproducible

Relevant log output

inventree-worker  | 2026-02-03 14:40:48,526 ERROR {'event': "Invalid SITE_URL value: 'http://inventree'. InvenTree server cannot start.", 'timestamp': '2026-02-03T14:40:48.525995Z', 'logger': 'inventree', 'level': 'error'}
inventree-worker  | Invalid SITE_URL value: 'http://inventree'. InvenTree server cannot start.
inventree-worker  | ERROR: InvenTree command failed: 'python3 manage.py wait_for_db'
inventree-worker  | - Refer to the error messages in the log above for more information
inventree-worker exited with code 255 (restarting)