Issues installing docker

[RolandWirth]

Hello,
I was trying to use CAMITAX with docker. All the databases have been successfully downloaded. However, I'm having issues with downloading and installing docker.

conda install -c conda-forge/label/cf202003 docker
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
PackagesNotFoundError: The following packages are not available from current channels:
- docker

Finally, when I do run CAMITAX I just get a blank run. Is it because docker isn't installed? Any suggestions to solve this is appreciated.
picture.pdf

We also ran the same command with singularity installed and get the exact same response as the attached picture. Command to run CAMITAX with singularity is below
run CAMI-challenge/CAMITAX -profile singularity --db ~/cami_dat/ --i PLS/1_11.fasta --x fasta

picture_2_singularity_run.pdf

[gdefazio]

I'm seeing the same issues about CAMITAX in nextflow docker use. I've installed nextflow on a conda env, then I've downloaded the DBs as suggested in README. Then I've tried to run CAMITAX but I've obtained the same output of @RolandWirth.
By suspecting that the docker installation could be the problem, I've created symbolic links of rooted installed docker in my conda env bin. But I haven't solved the problem.
Any suggestion about that?