Symlink exists error

[rgaudin]

I have seen many times an error loop in docker-compose log about a symlink not being able to be created because target path exist. This is for the file-resource container.

• it always happens when I have bigger fishes to fry 🙄
• I'm not sure if it's for zim-manager (ACCESS_MODE=manager) or resources (ACCESS_MODE=mixed)
• everytime I want to look into it, it's not happening anymore.
• we create symlinks in entrypoint on non-persistent folders (so it should be consistent!)
• unless entrypoint is launched multiple times (it's not) those symlinks should not exist and dont conflict with one another

[rgaudin]

Fixing for now (hoping b8d30d8 does the trick)