Update workflow to use npm

Author: FestiveAkp

.github/workflows/cd.yml

@@ -27,13 +27,13 @@ jobs:
           node-version: ${{ matrix.node }}
 
       - name: Install dependencies
-        run: yarn
+        run: npm ci
 
       - name: Build
-        run: yarn build
+        run: npm run build
 
       - name: Export
-        run: yarn next export
+        run: npx next export
 
 
       - name: Deploy