<NME> .readthedocs.yaml
<BEF> ADDFILE
<MSG> add readthedocs config

<DFF> @@ -0,0 +1,8 @@
+version: 2
+python:
+  install:
+    - method: pip
+      path: .
+    - requirements: docs/requirements.txt
+sphinx:
+  builder: dirhtml

add readthedocs config