fda96565ad
Outline runs as an unprivileged user in the image (``nodejs`` since 1.10.0, ``root`` up to 1.6.1) while the datastore is provisioned by ``root``. Without realignment the application cannot write its ``uploads``, ``public`` and ``avatars`` buckets, so every attachment upload fails with "Permission denied writing to ... Check the host machine file system permissions". This was seen on elabore.coop after the 1.6.1 to 1.10.0 upgrade. The ``init`` hook now reads the image's ``Config.User`` and chowns the datastore to that user, skipping root-based images. It is idempotent and version-agnostic: the realignment also covers buckets added by future Outline versions.