Unable to install NPM inside Docker - node.js

Question

I have a project that builds locally, and I try to create a Docker image.
In my project, I install NPM packages, and my package file is located at:
\src\Core.Blazor\package.json
But, when I try to build my Docker image, it failed with the following error:
npm ERR! code ENOLOCAL
npm ERR! Could not install "src/Core.Blazor/package.json" as it is not a directory and is not a file with a name ending in .tgz, .tar.gz or .tar
I join the Dockerfile too:
### >>> GLOBALS
ARG ENVIRONMENT="Production"
ARG PROJECT="PyProd.IdentityServer.Host"
### <<<
# debian buster - AMD64
FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
### >>> IMPORTS
ARG ENVIRONMENT
ARG PROJECT
### <<<
ARG NUGET_CACHE=https://api.nuget.org/v3/index.json
ARG NUGET_FEED=https://api.nuget.org/v3/index.json
# Copy sources
COPY src/ /app/src
ADD common.props /app
WORKDIR /app
# Installs NodeJS to build typescripts
RUN apt-get update
RUN apt-get install curl
RUN curl -sL https://deb.nodesource.com/setup_14.x | bash -
RUN apt-get install -y nodejs
RUN npm install /app/src/Core.Blazor/package.json
After trying to fix with the following, I also get an error:
RUN npm install /app/src/SmartPixel.Core.Blazor/
Here is the error I got:
> aspnet-parcel-exp#0.1.0 build /app/src/SmartPixel.Core.Blazor
> parcel build wwwroot/assets/blazorcore.js --out-dir wwwroot/dist/
sh: 1: parcel: not found
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! aspnet-parcel-exp#0.1.0 build: `parcel build wwwroot/assets/blazorcore.js --out-dir wwwroot/dist/`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the aspnet-parcel-exp#0.1.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?
I also join the package.json file:
{
"name": "aspnet-parcel-exp",
"private": true,
"version": "0.1.0",
"devDependencies": {
"parcel": "1.12.3"
},
"includePaths": [
"./wwwroot/assets/js",
"./wwwroot/assets/css"
],
"scripts": {
"build": "parcel build wwwroot/assets/blazorcore.js --out-dir wwwroot/dist/",
"watch": "parcel watch wwwroot/assets/blazorcore.js --out-dir wwwroot/dist/"
}
}

Answer 1

I don't know NodeJS, but as your error says:
npm ERR! Could not install "src/Core.Blazor/package.json" as it is not a directory and is not a file with a name ending in .tgz, .tar.gz or .tar
I believe you should change your Dockerfile to this:
RUN npm install /app/src/Core.Blazor/
Or even this:
RUN npm install /app/src/Core.Blazor
As the second one doesn't have trailing slash.