Improve root folder health check

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>
Signed-off-by: Robin Dadswell <robin@dadswell.email>
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f