Revised starter page and config

Author: drnw

observablehq.config.ts

@@ -22,4 +22,6 @@ export default {
     //     },
     //     { name: "Contributing", path: "/contributing", pager: false }
     // ],
+    footer: `By Observable, Inc. with contributions from <a href="https://www.tilix.ai">Tilix</a>`,
+
 };

playpen/index.md

@@ -1,12 +1,26 @@
-# Observable Framework++
+---
+hypothesis: true
+keywords: carpe diem
+---
 
-A fork by Tilix
+# Observable Framework++
 
-<div class="note">
-The best dashboards are built with code.
-Create fast, beautiful data apps, dashboards, and reports from the command line. Write Markdown, JavaScript, SQL, Python, R… and any language you like. Free and open-source.
+<div class="tip" label="A fork by Tilix">
+The best dashboards are built with code. Observable Framework helps in creating fast, beautiful data apps, dashboards, and reports. Write Markdown, JavaScript, SQL, Python, R… and any language you like. It is free, open-source and ready to fork.
 </div>
 
-**Observable Framework** is an [open-source](https://github.com/observablehq/framework) static site generator for data apps, dashboards, reports, and more. Framework includes a preview server for local development, and a command-line interface for automating builds & deploys.
+[Observable Framework](https://github.com/observablehq/framework) is an open-source static site generator for data apps, dashboards, reports, and more. Framework includes a preview server for local development, and a command-line interface for automating builds & deploys.
+
+Framework includes thoughtfully-designed themes, grids, and libraries to help you build displays of data that look great on any device, including Observable Plot, D3, Mosaic, Vega-Lite, Graphviz, Mermaid, Leaflet, KaTeX, and myriad more. And for working with data in the client, there’s DuckDB, Arquero, SQLite, and more, too.
+
+[Tilix](https://www.tilix.ai) is adding [Hypothesis](https://web.hypothes.is) integration and has several other ideas in the pipeline.
+
+```js
+1 + 2
+```
+
+```js
+display(frontmatter.keywords);
+```
 
-Framework includes thoughtfully-designed [themes](./themes), [grids](./markdown#grids), and [libraries](./imports) to help you build displays of data that look great on any device, including [Observable Plot](./lib/plot), [D3](./lib/d3), [Mosaic](./lib/mosaic), [Vega-Lite](./lib/vega-lite), [Graphviz](./lib/dot), [Mermaid](./lib/mermaid), [Leaflet](./lib/leaflet), [KaTeX](./lib/tex), and myriad more. And for working with data in the client, there’s [DuckDB](./lib/duckdb), [Arquero](./lib/arquero), [SQLite](./lib/sqlite), and more, too.
+${frontmatter.keywords}