Backups on the host

[pleirb]

Is there a way to have docker-duplicity-postgres backups done on the host by mounting a volume, for example: ./backup:/backup ?
I have tried and it is impossible to manipulate the files because this image is built with UID 0 (root). configure the common.yaml with user: "1000:1000" in the backup service but I get errors when performing backups. I am using a local target type: DST: "file:///backup" as environment variable
What is recommended to make a backup on the host?

[pleirb]

The key here is to use SFTP
I enabled ssh server on my host and then used this setting for duplicity in common.yaml:

DST: "pexpect+sftp://[email protected]/path/relative/backup"

I put the password in the environment variable of the file: ./docker/backup.env
FTP_PASSWORD=my_pass