Fix readthedocs deployment (#139)

* fix myst parser version print

* follow readthedocs instructions

* add setuptools to install SciServer

* install setuptools in correct venv

.github/workflows/continous_integration.yml

@@ -51,6 +51,7 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install poetry
           python -m poetry install
+          poetry run pip install setuptools
           cd SciScript-Python
           poetry run python Install.py sciserver-v2.1.0
           cd ..

.readthedocs.yaml

@@ -15,11 +15,9 @@ build:
       # Install poetry
       # https://python-poetry.org/docs/#osx--linux--bashonwindows-install-instructions
       - pip install poetry
-      # Tell poetry to not use a virtual environment
-      - poetry config virtualenvs.create false
     post_install:
         # Install project's dependencies
-      - poetry install --with docs
+      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH poetry install --with docs
       - python -c "import myst_parser; print(myst_parser.__version__)"
 
 # Build documentation in the docs/ directory with Sphinx