Issue while Dockerizing angular application

Question

I am very new to docker and angular , i am getting error index.html generation failed while builidng docker image can anyone help me how to resolve index.html generation failed error or correct me if there are any errors in my dockerfile.

Docker file

 FROM node:latest AS builder
 WORKDIR /csswebdockerimage
 COPY . .
 RUN npm i
 RUN npm run build --prod

 FROM nginx:alpine
 COPY --from=builder /csswebdockerimage/dist/cssweb-demo1/ /usr/share/nginx/html
 # EXPOSE 80
 # CMD ["nginx","-g"]

package.json

{
   "name": "cssweb-demo",
     "version": "0.0.0",
       "scripts": {
    "ng": "ng",
    "start": "ng serve  --poll=2000 --proxy-config proxy.config.json ",
    "build": "ng build",
     "watch": "ng build --watch --configuration development",
      "test": "ng test"
       },
     "private": true,
      "dependencies": {
    "@angular/animations": "~12.0.4",
   "@angular/cdk": "^12.0.4",
   "@angular/common": "~12.0.4",
   "@angular/compiler": "~12.0.4",
   "@angular/core": "~12.0.4",
   "@angular/forms": "~12.0.4",
   "@angular/material": "^12.0.4",
  "@angular/platform-browser": "~12.0.4",
   "@angular/platform-browser-dynamic": "~12.0.4",
   "@angular/router": "~12.0.4",
   "@ngtools/webpack": "^12.1.0",
   "angular-material": "^1.2.2",
   "rxjs": "~6.6.0",
   "tslib": "^2.1.0",
   "zone.js": "~0.11.4"
    },
  "devDependencies": {
   "@angular-devkit/build-angular": "~12.0.4",
   "@angular/cli": "~12.0.4",
   "@angular/compiler-cli": "~12.0.4",
   "@types/jasmine": "~3.6.0",
   "@types/node": "^12.11.1",
  "jasmine-core": "~3.7.0",
   "karma": "~6.3.0",
  "karma-chrome-launcher": "~3.1.0",
  "karma-coverage": "~2.0.3",
  "karma-jasmine": "~4.0.0",
   "karma-jasmine-html-reporter": "^1.5.0",
  "typescript": "~4.2.3"
   }
   }

Answer 1

Don't know if this resolves the issue, but here is how I dockerize Angular

FROM node:12-alpine
LABEL Author="okira-e"

COPY package*.json ./
RUN npm install -g @angular/cli
RUN npm install

RUN mkdir src
WORKDIR /src

COPY . .

EXPOSE 4200