Migrate 404 page and init 500 page

[HichamELBSI]

All in the title

[HichamELBSI]

ℹ️ We init the 500 page although there is no redirection to /500 in the app for the moment

[soupette]

Yes that's a good idea!

I think that at some point we should improve the error handling in the admin by having two different views:

• one in production that redirects the user to the 500 page
• one in development where we implement an error boundary properly

Anyway good work!

[codecov]

Codecov Report

Merging #12236 (9da450e) into master (2f29c55) will not change coverage.
The diff coverage is n/a.

❗ Current head 9da450e differs from pull request most recent head 6bbdb97. Consider uploading reports for the commit 6bbdb97 to get more accurate results

@@           Coverage Diff           @@
##           master   #12236   +/-   ##
=======================================
  Coverage   47.68%   47.68%           
=======================================
  Files         212      212           
  Lines        8223     8223           
  Branches     1863     1863           
=======================================
  Hits         3921     3921           
  Misses       3547     3547           
  Partials      755      755           

Flag	Coverage Δ
front	∅ <ø> (∅)
unit	47.68% <ø> (ø)

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[soupette]

LGTM