next.js

7643fc94 - example: restore .next handling for with-docker examples (#90651)

example: restore .next handling for with-docker examples (#90651) - Remove BuildKit cache mount on `.next/cache` that trapped fetch cache in a volume unreachable by the runner stage - Restore `mkdir .next && chown` in runner stage for writable prerender cache - Add commented-out `COPY .next/cache` line as opt-in for persisting build-time fetch cache - Apply same fixes to `Dockerfile.bun` (only needed the `mkdir`/`chown`, it never had the BuildKit mount) Closes #90648