Added action to deploy main branch to Github Pages

.github/workflows/demo-config.json

@@ -0,0 +1,9 @@
+{
+    "server": "mastodon.social",
+    "tags": ["foss", "cats", "dogs", "fediwall"],
+    "accounts": ["defnull@chaos.social"],
+    "limit": 20,
+    "interval": 10,
+    "theme": "dark",
+    "info": "top"
+}

.github/workflows/deploy-pages.yml

@@ -0,0 +1,45 @@
+name: Deploy demo site to GitHub Pages
+
+on:
+  push:
+    branches: ["main"]
+  workflow_dispatch:
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - name: Fetch dependencies
+        run: npm ci
+      - name: Copy demo config
+        run: cp .github/workflows/demo-config.json public/wall-config.json
+      - name: Build
+        run: npm run build -- --base=/fediwall/
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: dist/
+
+  deploy:
+    needs: build
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2