Use vagrant user in the Docker container.
Use vagrant user in the Docker container.

This is a bit of legacy from the current Vagrant environment used to do the release, but since it is not as easy to change the user in Vagrant, just make the Docker environment conform.

This allows documentation to be built in a Vagrant environment (or any environment with the same user name) and to be deployed in a Docker environment.

pgbackrest/pgbackrest,pgbackrest/pgbackrest,pgbackrest/pgbackrest