Fix Dockerfile link (#80)

diff --git a/README.md b/README.md
index 21c4dc2..4090ec2 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,9 @@
 
 ## Notes
 
-The website is built with [Pelican](https://blog.getpelican.com). A [Dockerfile](./Dockerfile) is provided as a convenience for running local builds.
+The website is built with [Pelican](https://blog.getpelican.com).
+
+The [infrastructure-pelican Dockerfile](https://github.com/apache/infrastructure-pelican/blob/master/Dockerfile) can be used to build the website locally, for testing.
 
 Continuous Integration / Continuous Deployment (CI/CD) is via the [.asf.yaml file](https://cwiki.apache.org/confluence/display/INFRA/Git+-+.asf.yaml+features)
 mechanism which runs [Buildbot](https://ci2.apache.org/#/builders/3/).