Make Docker pnpm install resilient to sharp ignored-builds; drop

unreachable gha cache

.gitea/workflows/docker-publish.yml

@@ -69,6 +69,8 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          # NOTE: type=gha cache is intentionally omitted. Gitea's act_runner cache
+          # service is not reachable from the buildx container on this instance, so
+          # cache import timed out (~30s) on every run. The Dockerfile's BuildKit
+          # cache mounts still speed up dependency installs within a build.
           platforms: linux/amd64