myapp/radicale/radicale.yaml

version: '3'
services:
  radicale:
    build: ./radicale
    image: radicale
    ports:
      - 5232:5232
    deploy:
      placement:
        constraints: [node.role == manager]
    volumes:
      - radicale:/home/radicale
volumes:
  radicale: