doc issues

.readthedocs.yml

@@ -1,6 +1,24 @@
-conda:
-    file: docs/environment.yml
+# .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: docs/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: 3.6
-    pip_install: true
+  version: 3.6
+  install:
+     - requirements: docs/requirements.txt
+  system_packages: true