Minor: docs location fix

Change-Id: Ifdb02451ee9feada4a18e8e67c1ac64a77efe973

.dockerignore

@@ -67,8 +67,8 @@ instance/
 .scrapy
 
 # Sphinx documentation
-docs/_build/
-docs/*/_static/
+doc/_build/
+doc/*/_static/
 
 # PyBuilder
 target/

.gitignore

@@ -66,7 +66,7 @@ instance/
 .scrapy
 
 # Sphinx documentation
-docs/_build/
+doc/_build/
 
 # PyBuilder
 target/

doc/source/index.rst

@@ -38,6 +38,6 @@ Building this Documentation
 
 Use ``make docs`` or ``tox -e docs`` to generate these docs. This will and
 build an html version of this documentation that can be viewed using a browser
-at docs/build/index.html on the local filesystem.
+at doc/build/index.html on the local filesystem.
 
 .. _Airship: https://airshipit.org