Add GH Pages deployment workflow

.github/workflows/gh-pages-deploy.yml

@@ -0,0 +1,50 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+  id-token: write
+  pages: write
+
+concurrency:
+  group: github-pages
+  cancel-in-progress: true
+
+env:
+  HUSKY: 0
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v3
+      - name: Install dependencies
+        run: npm ci
+      - name: Build
+        run: npm run build
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: dist
+  deploy:
+    needs: build
+    environment:
+      name: github-pages
+      url: ${{steps.deployment.outputs.page_url}}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@v2

README.md

@@ -1,3 +1,14 @@
 # hrynko.github.io
 
 [Hrynko](https://github.com/hrynko)'s personal website, which is powered by Jamstack and is based on Astro.
+
+## Development
+
+There are no special prerequisites other than the `node@20` environment. Once the project repository is cloned and the dependencies are installed, the development server can be started with the `dev` script (see [package.json](./package.json)).
+
+## Deployment
+
+![GitHub workflow status](https://img.shields.io/github/actions/workflow/status/hrynko/hrynko.github.io/gh-pages-deploy.yml)
+[![Website state](https://img.shields.io/website?url=https%3A%2F%2Fhrynko.github.io&label=hrynko.github.io)](https://hrynko.github.io)
+
+There is a [GitHub Actions workflow](.github/workflows/gh-pages-deploy.yml) configured to automatically build and deploy to GitHub Pages when a push to the `main` branch occurs. The site itself is reachable at https://hrynko.github.io/.