Last upgrade of Blocknote to 0.30.0 broke the SVG
export. The previewWidth can be undefined, which causes the
export to fail. This commit adds a fallback
width in case previewWidth is undefined.
The svg was not rendering in the pdf export.
We overwrite the default mapping to convert the
svg to png before rendering.
The images could be out of the page as well,
we fixed this issue by adding a maxWidth to the image.
We added content-security-policy on nginx.
It should be safe to allow svg files now.
We remove the svg file from the unsafe
attachments list. We adapt the tests accordingly.
Blocknote download button opens the file in a new
tab, which could be not secure because of XSS attacks.
We replace the download button with a new one that
downloads the file instead of opening it in a new tab.
Some files are flags as unsafe (SVG / js / exe),
for these files we add a confirmation modal before
downloading the file to prevent the user from
downloading a file that could be harmful.
In the future, we could add other security layers
from this model, to analyze the file before
downloading it by example.
