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问题出现在
COPY --from=frontend /app/dist /app/public
导致该问题的原因应该是无法在当前构建阶段(这里是frontend)修改该阶段的镜像,所以在这行代码前添加了另一个构建阶段(final),经测试可以成功构建前端镜像并正确运行。