Change the metadata format (#457)

* Chnage the metadata format

* Add syntax highlighting

* have simple_clock example run from local build to test change

Co-authored-by: Fabio Pliger <fabio.pliger@gmail.com>

examples/simple_clock.html

@@ -7,18 +7,17 @@
     <title>Simple Clock Demo</title>
 
     <link rel="icon" type="image/png" href="favicon.png" />
-    <link rel="stylesheet" href="https://pyscript.net/alpha/pyscript.css" />
+    <link rel="stylesheet" href="./build/pyscript.css" />
 
-    <script defer src="https://pyscript.net/alpha/pyscript.js"></script>
+    <script defer src="./build/pyscript.js"></script>
     <py-env>
     - paths:
       - ./utils.py
     </py-env>
     <py-config>
-      - autoclose_loader: false
-      - runtimes:
-        -
-          src: "https://cdn.jsdelivr.net/pyodide/v0.20.0/full/pyodide.js"
+      autoclose_loader: false
+      runtimes:
+        - src: "https://cdn.jsdelivr.net/pyodide/v0.20.0/full/pyodide.js"
           name: pyodide-0.20
           lang: python
     </py-config>