请问能push 到 dockerhub 上么 :D

[Lawrence-Dean]

root@ubuntu:~/Docker-War# sudo docker-compose build
WARNING: The DB_HOST variable is not set. Defaulting to a blank string.
WARNING: The DB_USER variable is not set. Defaulting to a blank string.
WARNING: The DB_PASS variable is not set. Defaulting to a blank string.
WARNING: The DB_NAME variable is not set. Defaulting to a blank string.
WARNING: The DEVISE_KEY variable is not set. Defaulting to a blank string.
WARNING: The MAIL_SENDER variable is not set. Defaulting to a blank string.
WARNING: The MAIL_USERNAME variable is not set. Defaulting to a blank string.
WARNING: The MAIL_PASSWORD variable is not set. Defaulting to a blank string.
WARNING: The APP_ID variable is not set. Defaulting to a blank string.
WARNING: The APP_SECRET variable is not set. Defaulting to a blank string.
WARNING: The RANCHER_URL variable is not set. Defaulting to a blank string.
WARNING: The RANCHER_ACCESS_KEY variable is not set. Defaulting to a blank string.
WARNING: The RANCHER_SECRET_KEY variable is not set. Defaulting to a blank string.
Building wargame
Step 1 : FROM phusion/passenger-ruby22
 ---> cfbd48daa4a3
Step 2 : MAINTAINER Firmhouse "[email protected]"
 ---> Using cache
 ---> b2be75e1e2a9
Step 3 : ENV HOME /root
 ---> Using cache
 ---> 97ba68cb59f0
Step 4 : ENV RAILS_ENV production
 ---> Using cache
 ---> 7af35b2b2b20
Step 5 : RUN usermod -aG docker_env app
 ---> Running in 558287ad4fd5
no such file or directory
ERROR: Service 'wargame' failed to build: Cannot start container 558287ad4fd52017b5120623738f4823af667539610a635d5af0d00b07a35266: [10] System error: could not synchronise with container process