Cached thumbnails dont work using reverse proxy

[collinkreutzer]

Describe the bug
Cached thumbnails (e.g. Footprint images shown in list or search view) are not displayed and have a wrong path when using a nginx reverse proxy.

To Reproduce
Steps to reproduce the behavior:

1. Host PartDB via Docker as describered here
2. Setup nginx reverse proxy
3. Create a footprint using one of the shipped footprint images (e.g. Ceramic-SMD_0603.png)
4. Create a part using this footprint
5. Check thumbnail in list, search and detail view. List and search show no thumbnail image and have a path beginning with //localhost:8080/media/cache/thumbnail_sm/img/footprints/ instead of the correct URL. In detail view, the correct image is shown (path "/img/footprints/...".

Expected behavior
Path begins with / to make it relative to the hostname or uses env parameter DEFAULT_URI to construct the correct URI.

Screenshots

Server Side

• Part-DB Version: 1.14.4
• PHP Version: 8.2.25
• Database Server: SQLite

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome
• Version 131.0.6778.70