cd /root/docker-files/pulsarReporting/memcached/     ./build    error!!

[root@localhost memcached]# ./build 
Sending build context to Docker daemon  5.12 kB
Sending build context to Docker daemon 
Step 0 : FROM debian:jessie
Pulling repository debian
Tag jessie not found in repository debian




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centos6.7_64.bit
help me , thanks!