Add instructions for how to build docs

CONTRIBUTING.md

@@ -155,14 +155,15 @@ currently using a minimum version of PyCharm 2019.2.4.
     `python -m eland.tests.setup_tests` to setup test environment -*note
     this modifies Elasticsearch indices*
 -   Install local `eland` module (required to execute notebook tests)
-    `python install setup.py`
--   Run `pytest --nbval  --doctest-modules` to validate install
+    `python setup.py install`
+-   Run `pytest --nbval` to validate install
 -   To test specific versions of Python use `nox -s test-3.8`
 -   To run the automatic formatter and check for lint issues
     run `nox -s blacken`
 
 
 ### Documentation
-
+-   [Install pandoc on your system](https://pandoc.org/installing.html)  
+    For Ubuntu or Debian you can do `sudo apt-get install -y pandoc`
 -   Install documentation requirements. Open terminal in virtual
     environment and run `pip install -r docs/requirements-docs.txt`

docs/requirements-docs.txt

@@ -2,7 +2,7 @@ elasticsearch>=7.0.5
 pandas>=1
 matplotlib
 pytest>=5.2.1
-git+https://github.com/pandas-dev/pandas-sphinx-theme.git@master
+git+https://github.com/pandas-dev/pydata-sphinx-theme.git@master
 numpydoc>=0.9.0
 nbsphinx
 scikit-learn

docs/source/conf.py

@@ -113,7 +113,7 @@ exclude_patterns = ["**.ipynb_checkpoints"]
 # a list of builtin themes.
 #
 # html_theme = 'sphinx_rtd_theme'
-html_theme = "pandas_sphinx_theme"
+html_theme = "pydata_sphinx_theme"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,