Add environment variable for production deployment

.github/workflows/builder.yml

@@ -7,16 +7,12 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    environment: prod
     permissions:
       packages: write
     steps:
       - uses: actions/checkout@v4
 
-      # Debugging step to check the GHA_READ_PKG's presence (DO NOT print the token itself)
-      - name: Debugging token presence
-        run: |
-          echo "Token length is ${{ secrets.GHA_READ_PKG | length }}"
-
       # Step 1: Fetch current image manifests
       - name: Fetch current manifests
         run: |