chore(ci for docs): Get docs online via github pages (#914)

* docs: get docs online via github pages new branch

* chore: set site and base according to astro docs

Astro docs: https://docs.astro.build/en/guides/deploy/github/#how-to-deploy suggest how to specifiy
the site url and base for GitHub pages.

---------

Co-authored-by: Jim Madge <jim@jmadge.com>

Author: lwasser

.github/workflows/build-website.yml

@@ -3,7 +3,7 @@ name: Deploy to GitHub Pages
 on:
   push:
     branches:
-      - main
+      - docs-upgrade
 jobs:
   build:
     name: Build Astro site

astro.config.mjs

@@ -1,14 +1,12 @@
 // @ts-check
 import { defineConfig } from 'astro/config';
 import starlight from '@astrojs/starlight';
-
 import sitemap from '@astrojs/sitemap';
-
 import tailwindcss from '@tailwindcss/vite';
 
 export default defineConfig({
-  site: 'https://allcontributors.org',
-  base: '/',
+  site: 'https://all-contributors.github.io',
+  base: '/all-contributors',
   output: 'static',
 
   redirects: {
@@ -76,4 +74,4 @@ export default defineConfig({
       },
     },
   },
-});
+});