We are trying to create a container running node.js, using docker (docker-compose, as we intend to add mongodb afterwards as well).
We are copying the package.json in Dockerfile and then mounting a volume in docker-compose.yml which contains the source code to be executed.
Our project structure is as follow.
We want source folder to be mounted as volume.
Our package.json file
{
"name": "node_package",
"version": "1.0.0",
"description": "node_package inside node_dir for node_service running on node_container",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "node source/index.js"
},
"author": "",
"license": "ISC",
"dependencies": {
"express": "^4.17.0"
}
}
Our Dockerfile
FROM node:10-alpine
WORKDIR /node_dir
COPY package*.json ./
RUN npm install
Our docker-compose.yml
version: "3"
services:
node_service:
build: .
container_name: node_container
user: node
working_dir: "/node_dir"
ports:
- "8080:3000"
volumes:
- ./source:/node_dir/source
command: npm start
Now when we run this on macOS, it works. It mounts the source folder as volume and then executes command npm start. But when we try the same on windows we get the following error
Cannot find module 'node_dir/source/index.js'
Why it is working on mac but not on windows?
Here is our index.js file
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, () => {console.log(`Example app listening on port ${port}!`)})
When we copy source folder in Dockerfile then it works on Windows. But if we don't copy source folder in Dockerfile and mount it as volume in docker-compose.yml then command npm start does not work.
