Minor fix

Author: kerobero

.github/workflows/main.yml

@@ -104,9 +104,9 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Log in to Docker Hub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          username: ${{ vars.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build and push image
@@ -115,8 +115,8 @@ jobs:
           context: ${{ env.APP_DIR }}
           push: true
           tags: |
-            ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}:${{ env.IMAGE_TAG }}
-            ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}:latest
+            ${{ vars.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}:${{ env.IMAGE_TAG }}
+            ${{ vars.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}:latest
 
 
   # ─────────────────────────────────────────────────────────────────────────────