refactor: enhance GitHub Actions workflow for SvelteKit deployment to GitHub Pages

Author: NotReeceHarris

.github/workflows/deploy.yml

@@ -1,25 +1,52 @@
-# This is a basic workflow to automatically build a Svelte app and deploy it to GitHub Pages
-
-name: Deploy to GitHub Pages
+name: Deploy SvelteKit to GitHub Pages
 
 on:
   push:
-    branches: [ main ]
-  workflow_dispatch:
+    branches:
+      - main
+  workflow_dispatch: # allow manual trigger
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
 
 jobs:
   build:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
-      - name: Install and Build
-        run: |
-          npm install
-          npm run build
-          
-      - name: Deploy to GitHub Pages
-        uses: JamesIves/github-pages-deploy-action@4.1.5
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
         with:
-          branch: gh-pages
-          folder: build
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build SvelteKit site
+        run: npm run build
+
+      - name: Upload build output
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: build
+
+  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