diff --git a/Dockerfile b/Dockerfile
index 01f70f4f99..019ba42971 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,11 @@
 
 FROM opendevorg/python-builder as builder
 
+# Optional location of Zuul API endpoint.
+ARG REACT_APP_ZUUL_API
+# Optional flag to disable React Service Worker. (set to true to disable)
+ARG REACT_APP_DISABLE_SERVICE_WORKER
+
 COPY . /tmp/src
 RUN /tmp/src/tools/install-js-tools.sh
 RUN assemble
diff --git a/doc/source/admin/installation.rst b/doc/source/admin/installation.rst
index 6408b6d015..900d2ffa81 100644
--- a/doc/source/admin/installation.rst
+++ b/doc/source/admin/installation.rst
@@ -338,7 +338,7 @@ Static External
    deployments.
 
 In order to serve the zuul dashboard code from an external static location,
-``REACT_APP_ZUUl_API`` must be set at javascript build time:
+``REACT_APP_ZUUL_API`` must be set at javascript build time:
 
 .. code-block:: bash
 
diff --git a/doc/source/developer/javascript.rst b/doc/source/developer/javascript.rst
index 7a2c465037..72b88657e4 100644
--- a/doc/source/developer/javascript.rst
+++ b/doc/source/developer/javascript.rst
@@ -156,7 +156,7 @@ api response needs to be set in the ``web/public/api`` directory.
   curl -o public/api/${route} https://zuul.openstack.org/api/${route}
   done
 
-To use an existing zuul api, uses the REACT_APP_ZUUl_API environment
+To use an existing zuul api, uses the REACT_APP_ZUUL_API environment
 variable:
 
 .. code-block:: bash