changing theme to rtd and adding rtd build requirements

docs/requirements.txt

+# Defining the exact version will make sure things don't break
+sphinx==5.3.0
+sphinx_rtd_theme==1.1.1
+readthedocs-sphinx-search==0.1.1
\ No newline at end of file

docs/source/conf.py

@@ -51,7 +51,7 @@ exclude_patterns = []
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'nature'
+html_theme = 'sphinx_rtd_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,

readthedocs.yaml

@@ -5,9 +5,9 @@ build:
   tools:
     python: "3.9"
 
-# python:
-  # install:
-    # - requirements: mbtrack2.yml
+python:
+  install:
+    - requirements: docs/requirements.txt
 
 sphinx:
   configuration: docs/source/conf.py