Use GITHUB_TOKEN for authentication

.github/workflows/build.yml

@@ -39,9 +39,9 @@ jobs:
 #        with:
 #          sarif_file: 'trivy-results.sarif'
 
-      - name: Docker login
+      - name: Login to the registry
         run: >-
-          echo "${{ secrets.GHCR_TOKEN }}"
+          echo "${{ secrets.GITHUB_TOKEN }}"
           | docker login -u "${{ github.actor }}" --password-stdin ghcr.io
 
       - name: Push image to GitHub