node.js-处于退出(0)状态的Docker应用

我正在尝试在Docker容器中运行一个小的服务器应用程序

index.js

var server_port = 3111,http     = require('http'),mosca    = require('mosca'),dispatch = require('dispatch'),httpServ = http.createServer(
    dispatch({
        '/': function(req,res,next){
            console.log('in route');
        }
    })
);

httpServ.listen(server_port,function() {
    console.log("listening on",server_port);
});

package.json

{
  "dependencies": {
    "dispatch": "^1.0.0"
  },"description": "","engines": {
    "node": ">= 0.10.4"
  },"main": "index.js","name": "SimpleServer","version": "0.0.1"
}

Docker文件

FROM    centos:centos6

# Enable EPEL for Node.js
RUN     rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
# Install Node.js and npm
RUN     yum install -y npm

# Install nodemon
RUN npm install -g nodemon

# Bundle app source
COPY . /src
# Install app dependencies
RUN cd /src; npm install

# Expose port
EXPOSE  3111

# Run app using nodemon
RUN echo "***" && pwd && echo "***"
CMD ["nodemon","/src/index.js"]

在Docker终端的SimpleServer工作目录中,命令$docker build -t test_simple.导致成功构建了43c8806574f4.到目前为止,任何在容器中运行映像的尝试(例如$docker run -p 3111 test_simple)都会始终导致代码退出,并且服务器未运行.

$docker run -p 3111 test_simple
19 Aug 07:22:56 - [nodemon] v1.4.1
19 Aug 07:22:56 - [nodemon] to restart at any time,enter `rs`
19 Aug 07:22:56 - [nodemon] watching: *.*
19 Aug 07:22:56 - [nodemon] starting `node /src/index.js`
Master: 16
19 Aug 07:22:57 - [nodemon] clean exit - waiting for changes before restart

$docker run -d -P test_simple node /src/index.js
a0a56ec5c13161bc37b523be0e32edec0a43ca82e7db88ddb2a91688f745b24b

$docker ps -l
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                     PORTS               NAMES
a0a56ec5c131        test_simple         "node /src/index.js"   6 seconds ago       Exited (0) 6 seconds ago                       jolly_bohr

我无法告知发生了什么,以及服务器为何退出.任何反馈表示赞赏.谢谢.