Update noxfile.py

Author: rmorshea

noxfile.py

@@ -248,16 +248,7 @@ def test_docs(session: Session) -> None:
     )
     session.run("sphinx-build", "-b", "doctest", "docs/source", "docs/build")
     # ensure docker image build works too
-    # session.run(
-    #    "docker",
-    #    "build",
-    #    ".",
-    #    "--file",
-    #    "docs/Dockerfile",
-    #    "--tag",
-    #   "idom-docs:latest",
-    #    external=True,
-    # )
+    session.run("docker", "build", ".", "--file", "docs/Dockerfile", external=True)
 
 
 @do_first