add hard coded sphinx dependency requirements for tutorial v4r3

Author: ifenty

.readthedocs.yaml

@@ -0,0 +1,29 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+      # You can also specify other tool versions:
+      # nodejs: "19"
+      # rust: "1.64"
+      # golang: "1.19"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: doc/conf.py
+
+# If using Sphinx, optionally build your docs in additional formats such as PDF
+formats:
+  - pdf
+
+# Optionally declare the Python requirements required to build your docs
+python:
+  install:
+  - requirements: requirements.txt

requirements.txt

@@ -1,5 +1,57 @@
-sphinx
-sphinx_rtd_theme
-cloud_sptheme
-nbsphinx
-ipykernel
+# removed ian 2023-05-08 sphinx
+#sphinx_rtd_theme
+#cloud_sptheme
+#nbsphinx-0.9.1
+#ipykernel
+
+# added ian 2023-05-08  
+alabaster==0.7.12
+    # via sphinx
+babel==2.11.0
+    # via sphinx
+certifi==2022.12.7
+    # via requests
+charset-normalizer==2.1.1
+    # via requests
+docutils==0.19
+    # via sphinx
+idna==3.4
+    # via requests
+imagesize==1.4.1
+    # via sphinx
+ipykernel==6.23.0
+    # from readthedocs log file
+jinja2==3.1.2
+    # via sphinx
+markupsafe==2.1.1
+    # via jinja2
+nbsphinx==0.9.1
+    # from readthedocs log file
+packaging==22.0
+    # via sphinx
+pygments==2.13.0
+    # via sphinx
+pytz==2022.7
+    # via babel
+requests==2.28.1
+    # via sphinx
+snowballstemmer==2.2.0
+    # via sphinx
+sphinx==5.3.0
+    # via -r docs.in
+sphinxcontrib-applehelp==1.0.2
+    # via sphinx
+sphinxcontrib-devhelp==1.0.2
+    # via sphinx
+sphinxcontrib-htmlhelp==2.0.0
+    # via sphinx
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==1.0.3
+    # via sphinx
+sphinxcontrib-serializinghtml==1.1.5
+    # via sphinx
+sphinx-rtd-theme==0.4.3
+    # from readthedocs log file
+urllib3==1.26.13
+    # via requests