Docker build - version of npm is incompatible with lockfileVersion#1 - node.js

Question

I'm trying to make a build a Docker image of a react application.
Here is the first part of the package.json:
{
"name": "front",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^5.14.1",
"#testing-library/react": "^11.2.7",
"#testing-library/user-event": "^12.8.3",
"eslint": "^7.29.0",
"html-react-parser": "^1.2.7",
"npm": "^6.14.4",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-input-mask": "^3.0.0-alpha.2",
"react-redux": "^7.2.4",
"react-router-dom": "^5.2.0",
"react-scripts": "^4.0.3",
"redux": "^4.1.0",
"semantic-ui-css": "^2.4.1",
"semantic-ui-react": "^2.0.3",
"web-vitals": "^1.1.2"
},
Here is the Dockerfile:
# pull official base image
FROM node:13.12.0-alpine
# set working directory
WORKDIR /app
# add `/app/node_modules/.bin` to $PATH
ENV PATH /app/node_modules/.bin:$PATH
ARG REACT_APP_BASEURL='https://localhost:8081'
ENV REACT_APP_BASEURL=$REACT_APP_BASEURL
# install app dependencies
COPY package.json ./
COPY package-lock.json ./
RUN npm install
# add app
COPY . ./
#EXPOSE
EXPOSE 3000
# start app
CMD ["npm", "start"]
So, I build with the command line:
docker build -f Dockerfile -t api_front .
and I've this error message:
npm WARN read-shrinkwrap This version of npm is compatible with
lockfileVersion#1, but package-lock.json was generated for
lockfileVersion#2. I'll try to do my best with it!
If I check the version of npm with npm -v , I've the latest one (7.19.1)
If I go to the project folder and I run npm install , everything is up-to-date
If I start the application with npm start , everything is ok and the api is running...
What is the problem?
Edit: SOLUTION
I've changed:
FROM node:13.12.0-alpine
to
FROM node:latest

Answer 1

The version of npm (v7.19.1) used to generate the package-lock.json file is newer than the version of npm (v6.14.4) inside the docker image of node 13.12.0.
1: The lockfile version used by npm v5 and v6.
2: The lockfile version used by npm v7, which is backwards compatible to v1 lockfiles.
You can read more about lockfile versions here
You can either upgrade the docker image to use the lastest version or downgrade your npm to generate a compatible package-lock.json
EDIT #1:
You have to replace the first line of your docker file with:
FROM node:16.4.2