COPY失败：在docker-compose up时未指定任何源文件

Question

express API的Dockerfile就像这样：

FROM node:10.15.3

MAINTAINER AshishkrGoyal <ashish.goyal@algoscale.com>

#RUN mkdir -p /usr/src/app

#define working dir
WORKDIR /usr/src/app

#available package.json, package-lock.json as well
COPY package*.json ./

#install all dependencies listed in package.json
RUN npm install

#copy all the source code to working dir
COPY . .

#mapping of port to docker daemon
EXPOSE 3000

#command in the form of array
CMD ["npm", "run", "dev"]

docker-compose.yml如下所示：

#specify the docker-compose version
version: '3.0'

services:
#specify all the services 
  angular: #it is frontend service container name
    build: public #dockerfile directory
    ports:
      - "4200:4200"

  express: #it is backend service container name
    build: server #dockerfile directory
    ports:
      - "3000:3000"
    links:
      - database

  database: #it is elastc search service container name
    image: docker.elastic.co/elasticsearch/elasticsearch:7.0.0
    ports:
        - "9200:9200"

在运行命令docker-compose时，出现以下错误： 错误：服务“ express”无法生成：COPY失败：未指定源文件

请帮助我解决此错误。

提前谢谢！

Answer 1

#copy all the source code to working dir
COPY . .

这将复制 host 的当前目录，这是映像创建过程的一部分。 docker-compose up ...是否从Express项目的根目录执行？否则，创建映像时将找不到Express项目文件。

Answer 2

请检查您的.gitignore文件是否忽略了源文件。