docker-compose up -d命令问题

#  docker-compose up -d 

Building ghost-app Step 2/4 :

COPY ./config,js /var/lib/ghost/config.js COPY faile

: file not found in build context or excluded by .dockerignore: stat config,js: file does not exist ERROR: Service 'ghost-app' failed to build : Build failed 

 老师这个是什么原因呢