upgrade node

.gitea/workflows/build.yaml

@@ -10,6 +10,8 @@ env:
   IMAGE: registry.traberph.de/public/homepage
   # Baked in at build time (canonical URLs); override with a repository variable.
   SITE_URL: ${{ vars.SITE_URL || 'https://traberph.de' }}
+  # Default Harbor instance baked into the image as an env var (overridable at runtime).
+  HARBOR_URL: ${{ vars.HARBOR_URL || 'https://registry.traberph.de' }}
 
 jobs:
   image:
@@ -50,9 +52,9 @@ jobs:
           platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.tags.outputs.tags }}
-          # Harbor settings are runtime env vars, so only the site URL is a build arg.
           build-args: |
             SITE_URL=${{ env.SITE_URL }}
+            HARBOR_URL=${{ env.HARBOR_URL }}
           labels: |
             org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
             org.opencontainers.image.revision=${{ steps.tags.outputs.sha }}