Host error page images

[alizedebray]

Error page template will be added to the documentation with this PR:

• chore(docs): add templates for multiple HTTP error types #6764

Implement the short term solution described bellow:#6802 (comment).

[alizedebray]

Long term solution: have them with other Design System assets on the CDN
Short term solution: host them with the fonts in a sub-folder (use the same solution as for App Store Badges)