Inconsistent build result - Node-Angular2-Webpack application while dockerizing

[rajagopal4890]

Hi.
I tried dockerizing my angular2 application built with webpack. Used the default node/latest.
Am using windows 10 with docker installed. My dockerfile is as follows:

FROM node:latest

RUN mkdir /WEBapp
WORKDIR /WEBapp

COPY package.json /WEBapp
RUN npm install

COPY . /WEBapp
RUN npm run build

EXPOSE 8000
CMD [ "npm", "run", "serve" ]

When I first did a 'docker build', the image build was successful and I was able to run the container.
When I built the image for the second time, am facing strange build issues while 'npm run build', which is basically a 'webpack' build command.
Am sure my webpack build is fine for two reasons:

1. I had never faced any issues so far with 'npm run build' during development in my windows 10 as well as ubuntu machine.
2. This is important. I ran the same thing in my ubuntu machine and no issues. Built the docker image for about 4 times and never got any build error, which I was getting, during my 2nd and successive builds on my windows 10.

I have even looked at my webpack configurations and I see no issues and this only occurs while I try dockerizing the application.
I'll definitely be trying other node images. However, I would like to know what has happened here. Is it Windows10 or this base image.

Refer to the attached file for webpack errors
error.txt

Thanks in advance!

[rajagopal4890]

An update on the issue:
This works:

FROM node:latest

RUN mkdir /WEBapp
WORKDIR /WEBapp

COPY . /WEBapp
RUN npm install
RUN npm run build

EXPOSE 8000
CMD [ "npm", "run", "serve" ]

With the earlier approach(mentioned below for ref), 'npm install' does not install all packages. When I logge into the container, I ran npm install again and then the build passed.

FROM node:latest

RUN mkdir /WEBapp
WORKDIR /WEBapp

COPY package.json /WEBapp
RUN npm install

COPY . /WEBapp
RUN npm run build

EXPOSE 8000
CMD [ "npm", "run", "serve" ]

[LaurentGoderre]

You should switch to the non-root user before running any of the npm commands.

FROM node:latest

USER node

RUN mkdir /WEBapp
WORKDIR /WEBapp

COPY package.json /WEBapp
RUN npm install

COPY . /WEBapp
RUN npm run build

EXPOSE 8000
CMD [ "npm", "run", "serve" ]

[enapupe]

You do realise you are copying node_modules folder (if there) to your container? You might be overriding node_modules installed deps (linux) with yours (windows).

FROM node:latest

RUN mkdir /WEBapp
WORKDIR /WEBapp

COPY package.json /WEBapp
RUN npm install

// here you might be overriding it with your own node_modules folder
COPY . /WEBapp
RUN npm run build

EXPOSE 8000
CMD [ "npm", "run", "serve" ]

A .dockerignore containing node_modules may be helpful.