docker compose for my nextcloud setup

docker-compose.yml

version: '3.5'

volumes:
  nextcloud:
  db:
  vhost.d:

services:
  proxy:
      image: jwilder/nginx-proxy:alpine
      restart: unless-stopped
      volumes:
          - ./certs:/etc/nginx/certs
          - vhost.d:/etc/nginx/vhost.d
          - /var/run/docker.sock:/tmp/docker.sock:ro
      networks:
          proxy-tier:
              ipv4_address: 172.20.0.100
      environment:
          - ENABLE_IPV6=false
      ports:
          - 443:443
          - 80:80

  app:
    image: nextcloud
    links:
        - db
    volumes:
        - nextcloud:/var/www/html
    restart: always
    depends_on:
        - db
    environment:
        - CERT_NAME=nextcloud.local
        - VIRTUAL_HOST=nextcloud.local
        - HTTPS_METHOD=noredirect
        - VIRTUAL_PORT=80
        - MYSQL_HOST=db
    env_file:
        - db.env
    networks:
        default:
        proxy-tier:
            ipv4_address: 172.20.0.200

  # whoami:
  #   image: jwilder/whoami
  #   restart: always
  #   environment:
  #   environment:
  #       - CERT_NAME=test.local
  #       - VIRTUAL_HOST=test.local
  #       - VIRTUAL_PORT=80
  #       - MYSQL_HOST=db
  #   env_file:
  #       - db.env
  #   networks:
  #       default:
  #       proxy-tier:
  #           ipv4_address: 172.20.0.201

  db:
    image: mariadb
    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
    restart: always
    volumes:
        - db:/var/lib/mysql
    environment:
        - MYSQL_ROOT_PASSWORD=ripbattery
    env_file:
        - db.env

networks:
    proxy-tier:
        ipam:
            config:
                - subnet: 172.20.0.0/16