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

hello-framework/README.md

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+# Spotify Analytics <20> Observable Framework
+
+Visualization dashboard built with [Observable Framework](https://observablehq.com/framework/) exploring a Spotify dataset (genres, languages, release years).
+
+**Live demo:** https://arussac-perso.github.io/observable_spotify/history-of-music
+
+## Pages
+- **Spotify Analytics** <20> bar charts and stacked area by genre/language with dual-range year filter.
+- **History of Music** <20> stacked area chart + donut chart showing genre evolution over time, filterable by language, period, and genre.
+
+## Run locally
+```
+npm install
+npm run dev   # ? http://localhost:3000
+```