找不到Docker package.json和未找到env变量

Question

我正在尝试重新排列我的项目结构。但是我的docker-compose文件出现了一些错误。

错误：

WARNING: The MONGO_USERNAME variable is not set. Defaulting to a blank string.
WARNING: The MONGO_PASSWORD variable is not set. Defaulting to a blank string.
WARNING: The MONGO_PORT variable is not set. Defaulting to a blank string.
WARNING: The MONGO_DB variable is not set. Defaulting to a blank string.
Recreating dcmapping2-server ... done
Starting db                  ... done
....
....
dcmapping2-server | npm ERR! path /home/node/app/package.json
dcmapping2-server | npm ERR! errno -2
dcmapping2-server | npm ERR! enoent ENOENT: no such file or directory, open '/home/node/app/package.json'
dcmapping2-server | npm ERR! enoent This is related to npm not being able to find a file.
dcmapping2-server | npm ERR! enoent 

我的项目的组织方式如下：（在src中，有一个nodejs后端和一个react前端）。

服务器Dockerfile如下：

FROM node:12-alpine
RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app
WORKDIR /home/node/app
COPY package*.json ./

RUN apk --no-cache add --virtual builds-deps build-base python

USER node
RUN npm install

COPY --chown=node:node . .

EXPOSE 8080

CMD ["npm", "run", "start"]

我的docker-compose.yml如下：

version: '3'

services:
  nodejs:
    build:
      context: ../../src/server
      dockerfile: Dockerfile
    image: dcmapping2-server
    container_name: dcmapping2_server
    restart: unless-stopped
    env_file: ../environment/.env.prod.server
    environment:
      - NODE_ENV=docker
      - MONGO_USERNAME=$MONGO_USERNAME
      - MONGO_PASSWORD=$MONGO_PASSWORD
      - MONGO_HOSTNAME=db
      - MONGO_PORT=$MONGO_PORT
      - MONGO_DB=$MONGO_DB
    ports:
      - "5055:8080"
    volumes:
      - .:/home/node/app
      - node_modules:/home/node/app/node_modules
    networks:
      - app-network
  db:
    image: mongo:4.2.3-bionic
    container_name: db
    restart: unless-stopped
    env_file:  ../environment/.env.prod.server
    environment:
      - MONGO_INITDB_ROOT_USERNAME=$MONGO_USERNAME
      - MONGO_INITDB_ROOT_PASSWORD=$MONGO_PASSWORD
    ports:
      - "28017-28019:27017-27019"
    volumes:
      - dbdata:/data/db
    networks:
      - app-network
networks:
  app-network:
    driver: bridge
volumes:
  dbdata:
  node_modules:

此文件尚不完整，但在此步骤中，服务器应正常运行。

我阅读了一些有关卷错误的答案，但是那里的答案对我没有帮助。

谢谢。