docker启动镜像时，运行可执行文件报"permission denied"

错误信息：

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2017-04-28 17:38:20:docker: {"message":"containerd: container not started"}
2017-04-28 17:38:26:container_linux.go:247: starting container process caused "exec: \"/IntelliJ/license_server\": permission denied"

解决方案：
在Dockerfile中增加

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RUN chmod +x ./license_server

参考：
https://github.com/facebook/fbctf/issues/431