我在为nodejs app配置docker时遇到问题。 
 
 我之前已经为php和rails设置了容器，端口转发工作完美无缺，但是对于这个实例我似乎无法让它工作。 
 
 运行： docker ps ，我得到以下内容： 
 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
a60f9c82d600        29c7d94a8c58        "/bin/sh -c 'npm s..."   5 seconds ago       Up 3 seconds        3000/tcp            romantic_albattani
 
 你可以看到我没有得到通常的： 0.0.0.0:3000->3000/tcp ： 0.0.0.0:3000->3000/tcp ，我期待。 
 
 docker-compose ps给出： 
 
Name   Command   State   Ports
------------------------------
 
 我的docker-compose.yml： 
 
web:
  build: .
  volumes:
    - .:/app
  volumes_from:
    - box
  ports:
    - "3000:3000"

box:
  image: busybox
  volumes:
    - /node_modules
 
 我的Docker文件： 
 
FROM node:8.7.0

# The base node image sets a very verbose log level.
ENV NPM_CONFIG_LOGLEVEL warn

WORKDIR /tmp
COPY package.json /tmp/
RUN npm install

WORKDIR /app
ADD . /app
RUN cp -a /tmp/node_modules /app/

#ENV PORT=3000
EXPOSE 3000
CMD npm start
 
 我正在运行命令： docker-compose up --build 
 
 在这一点上的任何帮助表示赞赏。 
 
 我不知道码头检查是否有用，但如果有，请告诉我，我也会发布。 
 
 编辑：更改了我的Dockerfile以遵循答案。 

I'm having problems configuring docker for my nodejs app.
 
I have previously set up containers for both php and rails with port forwarding working flawlessly, but for this instance i can't seem to get it to work.
 
Running: docker ps, i get the following:
 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
a60f9c82d600        29c7d94a8c58        "/bin/sh -c 'npm s..."   5 seconds ago       Up 3 seconds        3000/tcp            romantic_albattani
 
As you can see I'm not getting the usual: 0.0.0.0:3000->3000/tcp that I am expecting.
 
docker-compose ps gives:
 
Name   Command   State   Ports
------------------------------
 
My docker-compose.yml:
 
web:
  build: .
  volumes:
    - .:/app
  volumes_from:
    - box
  ports:
    - "3000:3000"

box:
  image: busybox
  volumes:
    - /node_modules
 
My Docker file:
 
FROM node:8.7.0

# The base node image sets a very verbose log level.
ENV NPM_CONFIG_LOGLEVEL warn

WORKDIR /tmp
COPY package.json /tmp/
RUN npm install

WORKDIR /app
ADD . /app
RUN cp -a /tmp/node_modules /app/

#ENV PORT=3000
EXPOSE 3000
CMD npm start
 
I'm running the command: docker-compose up --build
 
Any help at this point is appreciated.
 
I don't know if a docker inspect would be useful, but if so, tell me and i will also post it.
 
Edit: Changed my Dockerfile to follow the answer.

原文：https://stackoverflow.com/questions/46973944