Callout documentation includes readme and docs
Patchset 2: Clean-up.

Issue-ID: NONRTRIC-771
Change-Id: I65f4ac760d52c8579fdbf2773fa595b60d413c9a
Signed-off-by: halil.cakal <halil.cakal@est.tech>
diff --git a/tox.ini b/tox.ini
index 8250799..afa3e38 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 # ==================================================================================
-#       Copyright (c) 2020 Nordix
+#       Copyright (c) 2020-2022 Nordix
 #
 #   Licensed under the Apache License, Version 2.0 (the "License");
 #   you may not use this file except in compliance with the License.
@@ -48,11 +48,12 @@
 # doc jobs
 [testenv:docs]
 whitelist_externals = echo
-basepython = python3
+basepython = python3.8
 deps =
     sphinx
     sphinx-rtd-theme
     sphinxcontrib-httpdomain
+    sphinxcontrib-openapi==0.6.0
     recommonmark
     lfdocs-conf
 commands =
@@ -61,10 +62,11 @@
 
 [testenv:docs-linkcheck]
 skipsdist = true
-basepython = python3
+basepython = python3.8
 deps = sphinx
        sphinx-rtd-theme
        sphinxcontrib-httpdomain
+       sphinxcontrib-openapi==0.6.0
        recommonmark
        lfdocs-conf
 commands = sphinx-build -W -b linkcheck -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/linkcheck