fix: serve quartz with clean URL support and regenerate site

- Add serve.py to resolve clean Quartz URLs to .html files
- Regenerate Quartz site with correct baseUrl http://100.118.5.51:9120
- 196 HTML files emitted; all internal links now resolve

node_modules/underscore/modules/union.js

@@ -0,0 +1,9 @@
+import restArguments from './restArguments.js';
+import uniq from './uniq.js';
+import flatten from './_flatten.js';
+
+// Produce an array that contains the union: each distinct element from all of
+// the passed-in arrays.
+export default restArguments(function(arrays) {
+  return uniq(flatten(arrays, true, true));
+});