Mindmeld Docker Containers Currently Unrunnable

[Zozman]

Currently, the docker containers provided in the docker_containers directory of this repo are unrunnable. When attempting to run them, the following errors occur:

warning: en_core_web_sm not found on disk. Downloading the model.
/usr/bin/python: No module named spacy

In an attempt to rectify this, I attempted to install both spaCy as well as the en_core_web_sm by adding the following to here in the Dockerfile to install these:

# Install spaCy and the proper pipeline used by mindmeld for this language
RUN pip3 install -U spacy
RUN export LC_ALL=C.UTF-8 && \
    export LANG=C.UTF-8 && \
    python3 -m spacy download en_core_web_sm

This solves the original issue but then the following is seen when running the container:

KeyError: "[E002] Can't find factory for 'tok2vec'. This usually happens when spaCy calls `nlp.create_pipe` with a component name that's not built in - for example, when constructing the pipeline from a model's meta.json. If you're using a custom component, you can write to `Language.factories['tok2vec']` or remove it from the model meta and add it via `nlp.add_pipe` instead."

From here it seems that mindmeld is downgrading spacy when it's being installed so I think the required version at

mindmeld/setup.py

Line 39 in b644c6f

"spacy~=2.3,!=2.3.6", # avoid 2.3.6 because it was yanked from PyPI

(and then maybe all you would need is to install the correct pipeline).

This is officially over my head so therefore filing this issue.

Steps to reproduce:

1. Go to docker_containers/mindmeld_docker directory of this repo.
2. Run docker-compose build --no-cache.

[Zozman]

Provided a possible fix at #380 but not sure if this is the better way to fix it or changing what version of spacy is installed by mindmeld.