Github private packages are not installing in docker build - node.js

Question

I have an npm package hosted on github. It's working fine while working on the local machine. But it's not installing while the docker build process.
Dockerfile
FROM node:14-alpine as base
EXPOSE 8080
ARG LIB_GITHUB_TOKEN
ENV NODE_ENV=production \
LIB_GITHUB_TOKEN="${LIB_GITHUB_TOKEN}"
WORKDIR /home/node/app
RUN chown -R node:node /home/node/app
COPY --chown=node:node package.json package-lock*.json tsconfig.json .npmrc ./
RUN npm install --only=development
RUN ls -a **every pkgs installed except gihub pvt pkg**
RUN cd node_modules/ && ls
RUN npm run build
.npmrc file
registry=https://registry.npmjs.org/
#github_user:registry=https://npm.pkg.github.com/
//npm.pkg.github.com/:_authToken=${LIB_GITHUB_TOKEN}
Every packages are installed except my GitHub private package.
Same working properly with docker-compose.
If I add npm ci --only=production in dockerfile. it gives -
npm ERR! code E401
npm ERR! Unable to authenticate, need: Basic realm="GitHub Package Registry"

Answer 1

I tried using environment variables with .npmrc and I ran into the same 401 error you're experiencing. Instead of copying .npmrc into the image I added it to .dockerignore
And then do this in your Dockerfile
ARG github_token
ENV GITHUB_TOKEN=$github_token
RUN echo registry=https://registry.npmjs.org/ >> ~/.npmrc
RUN echo #github_user:registry=https://npm.pkg.github.com/ >> ~/.npmrc
RUN echo //npm.pkg.github.com/:_authToken=$GITHUB_TOKEN >> ~/.npmrc
And to build:
docker build . --build-arg github_token=${GITHUB_TOKEN}