为什么我不能将目录复制到docker容器?

我有自己的目录结构:

+projects
    +project_1
    +project_2

+node
    +container_1
        -Dockerfile

在我的Dockerfile中我复制了 project_1 到 /var/www/project_1 但不幸的是,它没有被复制:

#Dockerfile

FROM node:17
WORKDIR /var/www/project_1
COPY ../../projects/project_1 /var/www/project_1
RUN npm install
CMD ["npm","run","start:dev"]

错误:

 => ERROR [3/4] COPY ../../projects/project_1 /var/www/project_1                                                                                                                                                                                                               0.0s
------
 > [3/4] COPY ../../projects/project_1 /var/www/project_1:
------
failed to solve: rpc error: code = Unknown desc = failed to compute cache key: "/projects/project_1" not found: not found