ci: fix id duplication

Author: barelyhuman

.github/workflows/docker-pub.yml

@@ -38,13 +38,13 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GH_TOKEN }}
 
-      - name: Build Meta
+      - name: Build Nightly Meta
         run: |
-          echo "::set-output name=dtag::ghcr.io/barelyhuman/goblin:nightly-${{ steps.date.outputs.date }}"
+          echo "DEVELOPMENT_TAG=ghcr.io/barelyhuman/goblin:nightly-${{ steps.date.outputs.date }}" >> $GITHUB_ENV
 
       - name: Build Release Meta 
         run: | 
-          echo "::set-output name=rtag::ghcr.io/barelyhuman/goblin:${{ github.ref_name }}"
+          echo "RELEASE_TAG=ghcr.io/barelyhuman/goblin:${{ github.ref_name }}" >> $GITHUB_ENV
         if: github.ref_type == 'tag'
 
       - name: Build and push nightly
@@ -59,12 +59,12 @@ jobs:
           file: Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
-          tags: ${{ steps.meta.outputs.dtag }}
+          tags: ${{ env.DEVELOPMENT_TAG }}
 
       - name: Build and push nightly
         if: github.ref_type == 'tag'
         uses: docker/build-push-action@v5
-        id: push
+        id: pushRelease
         env:
           REGISTRY: ghcr.io
           OWNER: ${{ github.repository_owner }}
@@ -74,11 +74,19 @@ jobs:
           file: Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
-          tags: ${{ steps.meta.outputs.rtag }}
+          tags: ${{ env.RELEASE_TAG }}
 
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v1
         with:
           subject-name: ghcr.io/barelyhuman/goblin
           subject-digest: ${{ steps.push.outputs.digest }}
           push-to-registry: true
+      
+      - name: Generate artifact attestation
+        if: github.ref_type == 'tag'
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-name: ghcr.io/barelyhuman/goblin
+          subject-digest: ${{ steps.pushRelease.outputs.digest }}
+          push-to-registry: true