So I have a simple node js app that I want to dockerize.
const express = require("express");
const app = express();
const port = process.env.PORT || 8080;
app.get("/", (req, res) => {
res.json({
random: Math.random(),
});
});
app.listen(port, () => {
console.log(`Listening on port ${port}`);
});
And here's the package.json file
"scripts": {
"dev": "nodemon server.js"
},
To dockerize it and make my development easier I create a Dockerfile and docker-compose file for it like so
FROM node:18-alpine
RUN npm install -g nodemon
WORKDIR /app
COPY package*.json .
RUN npm install
COPY . .
EXPOSE 8080
CMD [ "npm", "run" ,"dev" ]
services:
api:
build: .
container_name: random-api
volumes:
- ./:/app
environment:
- PORT=8080
ports:
- "4000:8080"
As you can see I have set up the docker volumes, but strangely the nodemon is not reloading when the code change. am I missing something? what should I do to make the dockerize app reflect the change
With Docker for Windows watching a mapped folder, you need to use nodemon --legacy-watch.
User Meyey said here:
If you write data into the Windows folder mapped to the container path, it bypasses the Linux kernel and as such inotify never receives a filesystem event. You need to use legacy mode.