added readthedocs.yml

readthedocs.yml

+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  builder: html
+  configuration: doc/source/conf.py
+  fail_on_warning: true
+
+# Optionally build your docs in additional formats such as PDF
+formats:
+  - pdf
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.8
+  install:
+    - requirements: requirements.txt
+    - method: pip
+      path: .
+
+submodules:
+  include: []
+  recursive: False
+
+search:
+  ranking:
+    api/v1/*: -1
+    api/v2/*: 4
+  ignore:
+    - 404.html
\ No newline at end of file