circle config to push docs

.circleci/config.yml

@@ -1,8 +1,46 @@
-version: 2
+version: 2.1
 jobs:
   build_docs:
     docker:
       - image: circleci/python:3.6-stretch
+    steps:
+      - build_site
+      - store_artifacts:
+          path: docs/_build/html/
+          destination: html
+
+  push_docs:
+    docker:
+      - image: circleci/python:3.6-stretch
+    steps:
+      # Add deployment key fingerprint for CircleCI to use for a push
+      - add_ssh_keys:
+          fingerprints:
+            # The SSH key fingerprint
+            - "c5:70:b9:1b:9a:cf:e3:88:25:9f:33:8e:ee:09:76:9f"
+
+      - build_site
+
+      - run:
+          name: Pushing documentation to gh-pages
+          command: |
+            pip install --user ghp-import
+            ghp-import -n -p docs/_build/html
+
+workflows:
+  version: 2
+  default:
+    jobs:
+      - build_docs
+      - push_docs:
+          filters:  # using regex filters requires the entire branch to match
+              branches:
+                only:  # only branches matching the below regex filters will run
+                  - master
+
+commands:
+  build_site:
+    description: "Build the site with sphinx"
     steps:
       # Get our data and merge with upstream
       - run: sudo apt-get update
@@ -24,15 +62,4 @@ jobs:
           name: Build docs to store
           command: |
             cd docs
-            make html
-
-      - store_artifacts:
-          path: docs/_build/html/
-          destination: html
-
-
-workflows:
-  version: 2
-  default:
-    jobs:
-      - build_docs
+            make html