Using Docker Secret as a file without using Docker Swarm for Portainer

docker-compose.yml

version: '3.7'
services:
  portainer:
      image: portainer/portainer-ce:latest
      container_name: sys_portainer
      restart: always
      volumes:
        - /var/run/docker.sock:/var/run/docker.sock
      command:
        - '--admin-password-file=/run/secrets/portainer_admin_password'
        - '--no-analytics'
      networks:
        - some_network
      ports:
        - "9000:9000"
      secrets:
        - portainer_admin_password

networks:
  some_network:
    external: true

secrets:
  portainer_admin_password:
    file: ./portainer_admin_password

portainer_admin_password

p@55w0rd