Dockerfile Build fail

[L4puta]

https://github.com/easegress-io/easegress-portal/blob/main/rootfs/Dockerfile#L46
COPY --from=builder /app/public ./public

the public directory doesn't seem to exist

[su chen]

public is a empty folder in repo. it seems git not add it, we will fix that. you can add a simple empty folder public in repo to fix it now.