Vikunja with mail notifications

version: '3.3'

services:
  db:
    image: mariadb:10
    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    environment:
      MYSQL_ROOT_PASSWORD: xxxxxxx
      MYSQL_USER: vikunja
      MYSQL_PASSWORD: xxxxxx
      MYSQL_DATABASE: vikunja
    volumes:
      - ./Vikunjadb:/var/lib/mysql
    restart: unless-stopped
  api:
    image: vikunja/api
    environment:
      VIKUNJA_DATABASE_HOST: db
      VIKUNJA_DATABASE_PASSWORD: xxxxxx
      VIKUNJA_DATABASE_TYPE: mysql
      VIKUNJA_DATABASE_USER: vikunja
      VIKUNJA_DATABASE_DATABASE: vikunja
      VIKUNJA_MAILER_ENABLED: 1
      VIKUNJA_MAILER_FORCESSL: 1
      VIKUNJA_MAILER_HOST: ssl0.ovh.net
      VIKUNJA_MAILER_PORT: 465
      VIKUNJA_MAILER_USERNAME: a@s.com
      VIKUNJA_MAILER_FROMEMAIL: a@s.com
      VIKUNJA_MAILER_PASSWORD: xxxxxx
      VIKUNJA_SERVICE_TIMEZONE: Europe/Paris
    ports:
      - 3456:3456
    volumes:
      - ./files:/app/vikunja/files
    depends_on:
      - db
    restart: unless-stopped
  frontend:
    image: vikunja/frontend
    ports:
      - 9990:80
    environment:
      VIKUNJA_API_URL: http://x.x.x.x:3456/api/v1
    restart: unless-stopped