add ReadTheDocs config

.readthedocs.yaml

@@ -0,0 +1,28 @@
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    rust: latest
+  commands:
+    # install cargo-binstall
+    - >-
+      curl
+      -L --proto '=https' --tlsv1.2 -sSf
+      https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh
+      | bash
+    # add .cargo bin to PATH
+    # install mdbook and mdbook-alerts
+    # build docs
+    - >-
+      PATH=/home/docs/.cargo/bin:$PATH &&
+      cargo binstall --install-path /home/docs/.cargo/bin -y mdbook mdbook-alerts &&
+      mdbook build docs
+    # move HTML output to required RTD output path
+    - mkdir -p ${READTHEDOCS_OUTPUT}
+    - mv docs/book/html/ "${READTHEDOCS_OUTPUT}"