Cannot build local docker image

[JoshuaCrestone]

I am getting the following error:

W: GPG error: http://ftp.us.debian.org/debian testing InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY 648ACFD622F3D138 W: The repository 'http://ftp.us.debian.org/debian testing InRelease' is not signed.

[carynbear]

Added to $REPO_DIR/containers/base/Dockerfile:

RUN apt-key adv --keyserver   keyserver.ubuntu.com --recv-keys 04EE7237B7D453EC
RUN apt-key adv --keyserver   keyserver.ubuntu.com --recv-keys 648ACFD622F3D138

At the beginning of the # Setup OS and core packages section

But still errors with:

PackagesNotFoundError: The following packages are not available from current channels:

  - seaborn==0.7.0
  - python-dateutil==2.5.0
  - sympy==0.7.6.1

Current channels:

  - https://repo.anaconda.com/pkgs/main/linux-64
  - https://repo.anaconda.com/pkgs/main/noarch
  - https://repo.anaconda.com/pkgs/r/linux-64
  - https://repo.anaconda.com/pkgs/r/noarch
  - https://conda.anaconda.org/conda-forge/linux-64
  - https://conda.anaconda.org/conda-forge/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.