Added requirements.txt for ReadTheDocs (#1055)

sliverc · web-flow · commit 646d2a14df43 · 2022-02-21T13:42:56.000-05:00
Flake8 and Spinx cannot be installed together anymore as of conflict
with importlib-metadata package.

As RTD only supports one requirements.txt file we need a separate
one where only the dependencies for creation of documentation
are installed.
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -0,0 +1,6 @@
+# RTD only supports one requirements.txt file, therefore this has been created.
+# This file needs to keep in sync with tox testenv docs dependencies.
+
+-r ../requirements/requirements-optionals.txt
+-r ../requirements/requirements-testing.txt
+-r ../requirements/requirements-documentation.txt
