GitLab CI FTP deploy with mwienk/docker-lftp docker image

.gitlab-ci.yml

stages:
  - test
  - deploy

cache:
  paths:
    - vendor

# test job
test:
  stage: test
  image: edbizarro/gitlab-ci-pipeline-php:7.1
  script:
    - sudo composer install --prefer-dist --no-ansi --no-interaction --no-progress --no-scripts
    - vendor/bin/phpunit --configuration phpunit.xml

# upload job, see https://lftp.yar.ru/lftp-man.html
upload:
  stage: deploy
  image: mwienk/docker-lftp:latest
  script:
    - lftp -e "set ftp:ssl-allow false; mirror -eRnv app web/app; exit;" -u $FTP_USERNAME,$FTP_PASSWORD $FTP_HOST
  only:
    - master
  when: on_success

lftp options

• http://www.bouthors.fr/wiki/doku.php?id=en:linux:synchro_lftp
• https://lftp.yar.ru/lftp-man.html

Usage: mirror [OPTS] [remote [local]]

Mirror specified remote directory to local directory

 -c, --continue         continue a mirror job if possible
 -e, --delete           delete files not present at remote site
     --delete-first     delete old files before transferring new ones
 -s, --allow-suid       set suid/sgid bits according to remote site
     --allow-chown      try to set owner and group on files
     --ignore-time      ignore time when deciding whether to download
 -n, --only-newer       download only newer files (-c won't work)
 -r, --no-recursion     don't go to subdirectories
 -p, --no-perms         don't set file permissions
     --no-umask         don't apply umask to file modes
 -R, --reverse          reverse mirror (put files)
 -L, --dereference      download symbolic links as files
 -N, --newer-than=SPEC  download only files newer than specified time
 -P, --parallel[=N]     download N files in parallel
 -i RX, --include RX    include matching files
 -x RX, --exclude RX    exclude matching files
                        RX is extended regular expression
 -v, --verbose[=N]      verbose operation
     --log=FILE         write lftp commands being executed to FILE
     --script=FILE      write lftp commands to FILE, but don't execute them
     --just-print, --dry-run    same as --script=-

When using -R, the first directory is local and the second is remote.
If the second directory is omitted, basename of first directory is used.
If both directories are omitted, current local and remote directories are used.

lftp username could be also like that:

lftp ftp://username:password@host -e "set ftp:ssl-allow false; mirror -eRnv app app; exit;"

I am getting "mirror: Address not available" although the same command works when manually entered... I am unable to find any information on that error. Any clue?

EDIT: it seems to be a DNS issue with the mwienk/docker-lftp:latest probably, because with IP instead of hostname it works?

I know this is old, but I had some troubles with mirror command. Because some FTP servers are not keeping the modify time from the source. But changing it to upload time. I was dealing with it by using another tool (FTP Deployment) to handle changes and LFTP just to do parallel upload.
If you are interested, I wrote an article about it here: https://dev.to/arxeiss/parallel-incremental-ftp-deploy-in-ci-pipeline-2511