v1.15.2 docker does not start
### Describe the bug
status: 500 when calling the main page.
### Steps to reproduce
1. Choose "image: castopod/castopod:latest" or "image: castopod/castopod:1.15.2
2. Start up
3. Website does not load
### Expected behavior
Website should load. It loads successfully when using image: castopod/castopod:1.15.1
### Actual behavior
Error 500
### Context
- Castopod: 1.15.2
- OS: MacOS
- Browser: Safari
- Web server: Nginx
- [any other relevant context…]
### Possible fixes
[If you can, link to the line of code that might be responsible for the problem]
issue