added ci for deploying to vercel

.github/workflows/deploy-to-vercel.yaml

@@ -0,0 +1,25 @@
+name: Vercel Preview Deployment
+env:
+  VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
+  VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}
+on:
+  push:
+    branches-ignore:
+      - main
+jobs:
+  Deploy-Preview:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Vercel CLI
+        run: npm install --global vercel@latest
+
+      - name: Pull Vercel Environment Information
+        run: vercel pull --yes --environment=preview --token=${{ secrets.VERCEL_TOKEN }}
+
+      - name: Build Project Artifacts
+        run: vercel build --token=${{ secrets.VERCEL_TOKEN }}
+
+      - name: Deploy Project Artifacts to Vercel
+        run: vercel deploy --prebuilt --token=${{ secrets.VERCEL_TOKEN }}

vercel.json

@@ -6,5 +6,6 @@
             "destination": "express.js"
         }
     ],
-    "builds": [{ "src": "express.js", "use": "@vercel/node" }]
+    "builds": [{ "src": "express.js", "use": "@vercel/node" }],
+    "buildCommand": ""
 }