feat(debian): ci to use signing env key

Author: endersonmaia

.github/workflows/debian.yml

@@ -114,7 +114,7 @@ jobs:
     needs: [ debian-build, debian-test ]
     #FIXME: uncoment when have final signing key
     #if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
-    #environment: signing
+    environment: signing
     steps:
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -140,11 +140,11 @@ jobs:
       - name: Import GPG signing key
         working-directory: debian
         env:
-          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
+          DEB_KEY: ${{ secrets.DEB_KEY }}
         run: |
           mkdir -p key
           chmod 700 key
-          echo "$GPG_PRIVATE_KEY" | base64 -d | gpg --homedir "$(pwd)/key" --import
+          echo "$DEB_KEY" | gpg --homedir "$(pwd)/key" --import
 
       - name: Make index
         working-directory: debian