Add docs-auto Tox environment

Author: wsanchez

tox.ini

@@ -251,6 +251,25 @@ commands =
         "{toxworkdir}/docs/html"
 
 
+[testenv:docs-auto]
+
+description = build documentation
+
+basepython = python3.8
+
+deps =
+    Sphinx==2.2.1
+    sphinx-rtd-theme==0.4.3
+    sphinx-autobuild==0.7.1
+
+commands =
+    sphinx-autobuild                       \
+        -b html -d "{envtmpdir}/doctrees"  \
+        --host=localhost                   \
+        "{toxinidir}/docs"                 \
+        "{toxworkdir}/docs/html"
+
+
 ##
 # Packaging
 ##