Add "name" field to secrets and configs to allow interpolation in Compose files #667

version: "3.5" # future version

secrets:
  my-secret:
    name: my-secret-${VERSION} # name of the Docker Secret with variable interpolation
    file: ./secret.html

configs:
  my-config:
    name: my-config-${VERSION} # same thing for configs
    file: ./default.conf

services:
  web:
    image: nginx:1.13.5-alpine
    ports:
      - "80:80"
    secrets:
      - source: my-secret # reference by the name of the key, consistent with how it is for volumes now in 3.4
        target: /usr/share/nginx/html/index.html
    configs:
      - source: my-config
        target: /etc/nginx/conf.d/default.conf