Don't use inline style
One-sentence description
thalia.nu uses an inline style attribute to set the header background image, this causes problems when setting the Content-Security-Policy (https://gitlab.science.ru.nl/thalia/serverconfig/merge_requests/380, https://gitlab.science.ru.nl/thalia/serverconfig/issues/248)
Current behaviour
The background header image is set using an inline style attribute, CSP sends a report
Expected behaviour
Inline style attributes are not used on the thalia website
Steps to reproduce
- Go to thalia.nu
- View CSP reports in network tab
- Observe that reports are send about the inline style attribute for the background image