Map data volume

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1

The issue you are facing:

i have just setup nextcloud for the first time on my ubuntu 20.04 build,using the offical docker- compose. Everything is working and i have also setup haproxy infront of nextcloud service.
My question is how do i map the nextcloud storage data vol to a shared drive that i have already mounted with autofs in ubuntu to the path /mnt/nfs/nextcloud.

version: '2'

volumes:
  nextcloud:
  db:

services:
  db:
    image: mariadb
    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
    restart: always
    volumes:
      - db:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=
      - MYSQL_PASSWORD=
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud

  app:
    image: nextcloud
    ports:
      - 8080:80
    links:
      - db
    volumes:
      - nextcloud:/var/www/html
    restart: always

I have tried various ways but i keep getting errors. what format should the volume section be.

volumes:
  - /mnt/nfs/nextcloud:/mnt/nfs/nextcloud
  - data:/var/www/html/data
  - /mnt/nfs/nexcloud:/var/www/html/data
  - /home/user/nextcloud/data:/var/www/html/data