fixing a issue

on a pull request it was deploying on preview for 2 times

.github/workflows/explorer.yml

@@ -10,11 +10,13 @@ on:
     paths:
       - 'explorer/**'
 jobs:
-  check-explorer:
+  preview:
     runs-on: ubuntu-latest
+
     defaults:
       run:
         working-directory: explorer
+    if: github.event_name == 'pull_request_target' && github.event.action == 'opened'
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
@@ -31,23 +33,32 @@ jobs:
       - uses: amondnet/vercel-action@v20
         with:
           vercel-token: ${{ secrets.VERCEL_TOKEN }} # Required
-          github-token: ${{ secrets.PAT }} #Optional 
           vercel-org-id: ${{ secrets.ORG_ID}}  #Required
-          vercel-project-id: ${{ secrets.PROJECT_ID}} #Required 
-          working-directory: ./explorer
+          vercel-project-id: ${{ secrets.PROJECT_ID}} #Required
           scope: ${{ secrets.TEAM_ID }}
   production:
-   needs: check-explorer
    runs-on: ubuntu-latest
+   defaults:
+      run:
+        working-directory: explorer
    if: github.event_name == 'push'
    steps:
-     - uses: actions/checkout@v2
-     - uses: amondnet/vercel-action@v20
-       with:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          cache: 'npm'
+          cache-dependency-path: explorer/package-lock.json
+      - run: npm i -g npm@7
+      - run: npm ci
+      - run: npm run format
+      - run: npm run build
+      - run: npm run test
+      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2
+      - uses: amondnet/vercel-action@v20
+        with:
           vercel-token: ${{ secrets.VERCEL_TOKEN }} # Required
-          github-token: ${{ secrets.PAT }} #Optional 
           vercel-args: '--prod' #for production
           vercel-org-id: ${{ secrets.ORG_ID}}  #Required
           vercel-project-id: ${{ secrets.PROJECT_ID}} #Required 
-          working-directory: ./explorer
-          scope: ${{ secrets.TEAM_ID }}