Add env variable into a build process

.github/workflows/deploy-page.yml

@@ -2,40 +2,42 @@ name: Build the page
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 permissions:
   contents: write
   pages: write
-  id-token: write    
+  id-token: write
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-
-    - name: Setup Node.js
-      uses: actions/setup-node@v3
-      with:
-        node-version: 19
-
-    - name: Build
-      run: |
-        echo "Using Base path: $BASE_PATH"
-        npm install
-        npm run build
-
-    - name: Upload artifact
-      uses: actions/upload-pages-artifact@v2
-      with:
-        path: ./dist
-
-    - name: Deploy
-      uses: peaceiris/actions-gh-pages@v3
-      with:
-        github_token: ${{ secrets.GITHUB_TOKEN }}
-        publish_dir: ./dist       
+      - uses: actions/checkout@v3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 19
+
+      - name: Build
+        run: |
+          echo "Using Base path: $BASE_PATH"
+          npm install
+          npm run build
+        env:
+          BASE_PATH: ${{vars.BASE_PATH}}
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: ./dist
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./dist