How do add --inspect=0.0.0.0:9229 when using nextjs running in a Docker. Currently in docker file the app is started
# Start the app
CMD ["npm", "start"]
in package.json:
"scripts": {
"dev": "next dev",
"build": "next build",
"start": "next start",
"lint": "next lint"
},
Where do I add --inspect=0.0.0.0:9229 so that I can take a memory dump snapshot.
🚨 You need to share port 9229 from your container, so don't forget to supply -p 9229:9229 when you docker run.
Option 1: Dockerfile
One option would be to put it into your Dockerfile (see simplified version below):
FROM node:18.17.0-alpine as base
WORKDIR /app
COPY next.config.js package.json .
COPY pages/ ./pages
RUN npm install --frozen-lockfile
RUN npm run build
ENV NODE_OPTIONS="--inspect=0.0.0.0:9229"
CMD npm start
Option 2: Command Line
Alternatively you can supply the environment variable on the command line when you docker run like this:
docker run -e NODE_OPTIONS="--inspect=0.0.0.0:9229" -p 9229:9229 <other arguments>