Add Astro project structure and initial pages

Author: copyleftdev

.astro/types.d.ts

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+/// <reference types="astro/client" />

.github/workflows/deploy.yml

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+name: Deploy Astro to GitHub Pages
+
+on:
+  push:
+    branches: [ "master" ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v4
+      
+      - name: Build with Astro
+        run: npm run build
+        env:
+          NODE_ENV: production
+      
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./dist
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

astro.config.mjs

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+import { defineConfig } from 'astro/config';
+import tailwind from '@astrojs/tailwind';
+import mdx from '@astrojs/mdx';
+import sitemap from '@astrojs/sitemap';
+
+export default defineConfig({
+  site: 'https://copyleftdev.github.io',
+  base: '/sigmos',
+  integrations: [
+    tailwind(),
+    mdx(),
+    sitemap()
+  ],
+  markdown: {
+    shikiConfig: {
+      theme: 'github-dark-dimmed',
+      langs: ['javascript', 'typescript', 'rust', 'bash', 'json', 'yaml'],
+      wrap: true
+    }
+  },
+  vite: {
+    ssr: {
+      noExternal: ['@astrojs/prism']
+    }
+  }
+});