Some possible references::

Conda Install Requirements

Activating a Conda environment in your Dockerfile

• Are there Docker Images that have coda already?

• Creating a conda env and installing requirements.txt::

  conda create --name <conda_env_name> --file requirements.txt
  

  conda install --file requirements.txt
  

• Docker image that I see over and over again in blog posts, it’s called python:3-slim-buster::

python - Official Image | Docker Hub