Merge branch 'bugfix/docs_build' into 'master'

docs: pin setuptools<58 to resolve build failure due to removal of support for 2to3 during builds

See merge request rd/esp-iot-solution!543

.readthedocs.yml

@@ -14,4 +14,5 @@ formats:
 python:
   version: 3.7
   install:
+    - requirements: docs/setuptools.requirements.txt
     - requirements: docs/requirements.txt

docs/requirements.txt

@@ -1,16 +1,16 @@
 # This is a list of python packages used to generate documentation. This file is used with pip:
 # pip install --user -r requirements.txt
 #
+setuptools<58
 sphinx==2.3.1
 breathe==4.14.1
-sphinx-rtd-theme
-sphinx-notfound-page
+sphinx-rtd-theme==1.0.0
+sphinx-notfound-page==0.7.1 
 sphinxcontrib-blockdiag==2.0.0
 sphinxcontrib-seqdiag==2.0.0
 sphinxcontrib-actdiag==2.0.0
 sphinxcontrib-nwdiag==2.0.0
 sphinxcontrib-wavedrom==2.0.0
 nwdiag==2.0.0
-docutils<0.17
-recommonmark
-future>=0.16.0 # for ../tools/gen_esp_err_to_name.py
+recommonmark==0.7.0
+future==0.16.0 # for ../tools/gen_esp_err_to_name.py

docs/setuptools.requirements.txt

@@ -0,0 +1 @@
+setuptools<58