fix: Add id-token permissions for attestation in build-linux job

.github/workflows/docker-build.yml

@@ -25,6 +25,8 @@ jobs:
     permissions:
       contents: read
       packages: write
+      id-token: write
+      attestations: write
       
     steps:
       - name: Checkout repository
@@ -71,6 +73,8 @@ jobs:
           platforms: linux/amd64
 
       - name: Generate artifact attestation
+        if: github.event_name != 'pull_request'
+        continue-on-error: true
         uses: actions/attest-build-provenance@v1
         with:
           subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}