docker-compose file for Let's Encrypt on a Synology

docker-compose.yml

version: '2'  
services:  
  proxy:
    image: jwilder/nginx-proxy
    container_name: nginx-proxy
    ports:
      - '30080:80'
      - '4343:443'
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - /etc/nginx/vhost.d # to update vhost configuration
      - /volume4/docker/nginx-proxy/html:/usr/share/nginx/html # to write challenge files
      - /volume4/docker/nginx-proxy/certs:/etc/nginx/certs:ro # update this to change cert location
  web:
    image: 'nginx'
    container_name: nginx-web
    expose: 
      - '80'
    environment:
      - VIRTUAL_HOST=your_comma_separated_list_of_fqdns
      - VIRTUAL_PORT=80
      - LETSENCRYPT_TEST=false
      - LETSENCRYPT_HOST=your_comma_separated_list_of_fqdns
      - LETSENCRYPT_EMAIL=your@email
  ssl-companion:
    image: jrcs/letsencrypt-nginx-proxy-companion
    container_name: ssl-companion
    dns:
      - '8.8.8.8'
      - '8.8.4.4'
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro #companion maps differently
      - /volume4/docker/nginx-proxy/certs:/etc/nginx/certs:rw # same path as above, now RW
    volumes_from:
      - proxy
    depends_on:
      - proxy