404 handler

scripts/transform-file.py

@@ -97,7 +97,7 @@ def markdown_to_html(input_file, output_dir):
                     pages.append((dir + '/' + uri,
                                   os.path.normpath(os.path.join(base_dir, path, name))))
 
-        builtins = ['/', '/about/', '/about/niels', '/misc/']
+        builtins = ['/', '/about/', '/about/niels', '/misc/', '/404']
         pages = filter(lambda t: t[0] not in builtins, pages)
         pages_new = []
         for page in pages: