Set up .readthedocs.yml to build using Sphinx 4

diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644 (file)
index 0000000..a4a09ac
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,19 @@
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.9"
+
+sphinx:
+   configuration: docs/conf.py
+
+formats:
+  - epub
+  - pdf
+
+python:
+   install:
+   - requirements: docs/requirements.txt

diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644 (file)
index 0000000..aaedb21
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1 @@
+Sphinx~=4.4.0