fix: hardcode PGPASSWORD default so loaders work without local .env

hello-framework/observablehq.config.js

@@ -0,0 +1,18 @@
+// See https://observablehq.com/framework/config for documentation.
+export default {
+  title: "Spotify Analytics",
+
+  pages: [
+    { name: "Vue d'ensemble", path: "/" },
+    { name: "History of Music", path: "/history-of-music" },
+    { name: "Tendances par Langue", path: "/language-trends" },
+    { name: "Audio Features", path: "/audio-features" },
+  ],
+
+  head: '<link rel="icon" href="observable.png" type="image/png" sizes="32x32">',
+
+  root: "src",
+
+  // Base path for GitHub Pages deployment
+  base: "/observable_spotify/",
+};