Fix custom 404

Author: dbader

docs/Makefile

@@ -59,6 +59,10 @@ dirhtml:
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
 
+netlify: dirhtml
+	@cp $(BUILDDIR)/dirhtml/404/index.html $(BUILDDIR)/dirhtml/404.html
+	@cp _extra/* $(BUILDDIR)/dirhtml/
+
 singlehtml:
 	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
 	@echo

docs/_extra/_redirects

@@ -0,0 +1,5 @@
+# https://www.netlify.com/docs/redirects/
+
+
+# Redirect internal URL to python-guide.org
+# https://python-guide.netlify.com/* https://docs.python-guide.org/:splat 301!