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The nginx logs were redirected to stdout and stderr, however we need
them in files in order to display them in the vidjil admin page.

app moved, the repository did not. Until we have decided on a generic
name for the backend server, vda will have to suffice.

Although root should work, it's always safer to run things as non-root
users

the fuse server was referenced as localhost in the code. However, for
the separation of reposibilities to work correctly in the docker
installation it was necessary to add a variable in order to be able to
reference the correct container for running custom fuse jobs

FS_LOCK_THRESHHOLD and SCHEDULER_HEARTBEAT were missing from defs

The repository address was set to a server-specific address. This one
should always point to the correct server

The initial docker configuration wasn't working correctly, so this was
an opportunity to switch to a docker-compose to manage individual
services.
This allowed to also better fit the docker philosophy of lightweight
containers that manage only a single services and/or process