chore: deploy Flutter web to Vercel via GitHub Actions

Author: MT16204

.github/workflows/deploy-vercel.yml

@@ -0,0 +1,34 @@
+name: Deploy to Vercel
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.29.3'
+          channel: 'stable'
+          cache: true
+
+      - name: Install dependencies
+        run: flutter pub get
+
+      - name: Build Flutter Web
+        run: flutter build web --release
+
+      - name: Install Vercel CLI
+        run: npm install -g vercel
+
+      - name: Deploy to Vercel
+        run: vercel deploy build/web --token=${{ secrets.VERCEL_TOKEN }} --prod --yes
+        env:
+          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
+          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}

vercel.json

@@ -1,6 +1,4 @@
 {
-  "buildCommand": "flutter build web --release",
   "outputDirectory": "build/web",
-  "installCommand": "if ! command -v flutter &> /dev/null; then git clone https://github.com/flutter/flutter.git -b stable --depth 1 ~/flutter && export PATH=$PATH:~/flutter/bin && flutter doctor; fi",
   "framework": null
-}
+}