do_nextcloud/nextcloud-compose.yml

version: '3'

services:
   cloud-db:
     container_name: ${DB_CONTAINER_NAME}
     image: mariadb:${DB_IMAGE_TAG}
     restart: unless-stopped
     volumes:
        - ${LOCAL_DB_DIR}:/var/lib/mysql
     environment:
       MYSQL_DATABASE: ${MYSQL_DATABASE}
       MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
       MYSQL_USER: ${MYSQL_USER}
       MYSQL_PASSWORD: ${MYSQL_PASSWORD}

   cloud-app:
     depends_on:
       - cloud-db
     container_name: ${APP_CONTAINER_NAME}
     image: nextcloud:${APP_IMAGE_TAG}
     restart: unless-stopped
     volumes:
       - ${LOCAL_DATA_DIR}:/var/www/html
       - ${LOCAL_CONF_DIR}:/var/www/html/config
       - ${LOCAL_APPS_DIR}:/var/www/html/apps
     environment:
       NEXTCLOUD_ADMIN_USER: ${NEXTCLOUD_ADMIN_USER}
       NEXTCLOUD_ADMIN_PASSWORD: ${NEXTCLOUD_ADMIN_PASSWORD}
       NEXTCLOUD_DATA_DIR: ${NEXTCLOUD_DATA_DIR}
       NEXTCLOUD_TABLE_PREFIX: ${NEXTCLOUD_TABLE_PREFIX}
       VIRTUAL_HOST: ${VIRTUAL_HOST}
       LETSENCRYPT_HOST: ${LETSENCRYPT_HOST}
       LETSENCRYPT_EMAIL: ${LETSENCRYPT_EMAIL}
       MYSQL_DATABASE: ${MYSQL_DATABASE}
       MYSQL_USER: ${MYSQL_USER}
       MYSQL_PASSWORD: ${MYSQL_PASSWORD}
       MYSQL_HOST: ${MYSQL_HOST}

networks:
    default:
       external:
         name: ${NETWORK}