`docutils` moved to required dependencies.

docs/source/conf.py

@@ -305,6 +305,7 @@ autodoc_mock_imports = [
     'simple_websocket',
     'uvicorn',
     'websockets',
+    'docutils',
 ]
 
 sys.path.insert(0, os.path.abspath('../..'))

requirements.txt

@@ -5,6 +5,7 @@
 alembic
 bcrypt
 croniter
+docutils
 flask
 frozendict
 marshmallow

setup.py

@@ -63,6 +63,7 @@ setup(
         'alembic',
         'bcrypt',
         'croniter',
+        'docutils',
         'flask',
         'frozendict',
         'marshmallow',
@@ -202,8 +203,6 @@ setup(
         'mlx90640': ['Pillow'],
         # Support for machine learning models and cameras over OpenCV
         'cv': ['opencv-python', 'numpy', 'Pillow'],
-        # Support for the generation of HTML documentation from docstring
-        'htmldoc': ['docutils'],
         # Support for Node-RED integration
         'nodered': ['pynodered'],
         # Support for Todoist integration