Make sure file generated by docker-gen has the right permissions #308
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If the destination file does not exists, the permissions become
600
because this is the default permission for temp files.This is problematic, if the container consuming the destination file does not run as root.
Instead, the default permissions should be used (as per umask).
This PR will make permission
644
, which is generally what we want. And if the container consuming it is not happy with it, it always can override the permissions.