add requirements.txt file for docs creation, add readthedocs.yml file…

… too

.readthedocs.yml

@@ -0,0 +1,23 @@
+# .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:
+  configuration: site/conf.py
+
+# Build documentation with MkDocs
+#mkdocs:
+#  configuration: mkdocs.yml
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats: all
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.7
+  install:
+    - requirements: site/requirements.txt

site/Dockerfile

@@ -1,9 +1,9 @@
 FROM ddidier/sphinx-doc
 
+COPY requirements.txt .
+
 RUN apt update && apt install -y linkchecker && \
-    pip install 'sphinx                 == 2.1.2' \
-                'sphinx_markdown_tables == 0.0.9' \
-                'recommonmark           == 0.5.0'
+    pip install -r requirements.txt
 
 WORKDIR /doc
 

site/requirements.txt

@@ -0,0 +1,3 @@
+sphinx                 == 2.1.2
+sphinx_markdown_tables == 0.0.9
+recommonmark           == 0.5.0