Docker: Roundcube container

docker run --name=roundcube \
  -e ROUNDCUBEMAIL_DEFAULT_HOST=imap.example.com \
  -e ROUNDCUBEMAIL_SMTP_SERVER=smtp.example.com \
  -e ROUNDCUBEMAIL_SMTP_PORT=993 \
  -p 8080:80 \
  -d  roundcube/roundcubemail