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I am building an Angular 8 SPA. I have a Dockerfile that is built and run using a Docker Compose configuration.

The configuration has been working for several weeks, but today, it suddenly stopped working. I didn't make any changes to what was working previously.

The Angular app no longer compiles due to a module error and all development is now blocked due to this issue.

error TS2307: Cannot find module 'ngx-cookie-service'.

I tried:

• Uninstalling and re-installing the ngx-cookie-service module

• Deleting and re-creating node_modules and package-lock.json

• Running npm cache clean

• Running docker system prune and re-building the image

• Manually changing the version of ngx-cookie-service

• Confirmed that the node_modules/ngx-cookie-service directory is present

QUESTION:

What other steps can I take to troubleshoot the issue?

package.json

{
  "name": "client",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test --browsers ChromeHeadlessNoSandbox",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~8.0.0",
    "@angular/cdk": "^8.0.1",
    "@angular/common": "~8.0.0",
    "@angular/compiler": "~8.0.0",
    "@angular/core": "~8.0.0",
    "@angular/flex-layout": "^8.0.0-beta.26",
    "@angular/forms": "~8.0.0",
    "@angular/material": "^8.0.1",
    "@angular/platform-browser": "~8.0.0",
    "@angular/platform-browser-dynamic": "~8.0.0",
    "@angular/router": "~8.0.0",
    "angular2-query-builder": "^0.4.2",
    "express-jwt": "^5.3.1",
    "file-saver": "^2.0.2",
    "hammerjs": "^2.0.8",
    "ngx-cookie-service": "^2.0.0",
    "rxjs": "~6.4.0",
    "tslib": "^1.9.0",
    "xlsx": "^0.15.1",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.800.0",
    "@angular/cli": "~8.0.1",
    "@angular/compiler-cli": "~8.0.0",
    "@angular/language-service": "~8.0.0",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~3.3.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^5.0.0",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.0",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.15.0",
    "typescript": "~3.4.3"
  }
}

Dockerfile

### Local development only ###

FROM node:12.8-alpine

# Install bash
RUN apk add --no-cache bash

# Create working directory
RUN mkdir -p /home/node/app

# Set working directory
WORKDIR /home/node/app

# Add `/home/node/app/node_modules/.bin` to $PATH
ENV PATH /home/node/app/node_modules/.bin:$PATH

# Copy code
COPY ./angular /home/node/app

# Expose ports
EXPOSE 4201:4201

RUN npm install

# Start Angular
CMD ng serve --host 0.0.0.0

docker-compose.yml

version: '3.5'

services:

  client:
    build:
      context: ./client
      dockerfile: Dockerfile
    volumes:
      - './client/angular/:/home/node/app'
      - '/home/node/app/node_modules'
    ports:
      - '4201:4201'
    depends_on:
      - server

Answers

When you copy the build in your Dockerfile during build then there is no need to mount the host directory in docker-compose.

# Copy code
COPY ./angular /home/node/app

This is enough to run the app so you can remove these from your Docker-compose.

      - './client/angular/:/home/node/app'
      - '/home/node/app/node_modules'

If you want to run form container mount the build directory with container.

      - './client/angular/:/home/node/app'

Also, you can debug the package. after installation list the package.

RUN npm install
RUN npm list

OR if the still issue persists then tries the package as a global package.

RUN npm i ngx-cookie-service -g

Sometimes the host bind modules not working as we expect due to different binaries so better to install at run time in docker-compose.

Add this in docker-compose file

command: sh -c "
  npm i &&
  ng serve --host 0.0.0.0"