Dockerfile - Angular with ng serve

.dockerignore

node_modules
.git

docker-compose

version: '3.5'

services:
   angular:
     container_name: angular-container
     build:
       context: app
       dockerfile: Dockerfile
     volumes:
       - './app:/usr/src/app'
       - '/usr/src/app/node_modules'
     ports:
       - 4200:4200

Dockerfile

# base image
FROM node:10.15.1

# install chrome for protractor tests
RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
RUN sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
RUN apt-get update && apt-get install -yq google-chrome-stable
RUN npm install -g npm
RUN npm install -g @angular/cli

# set working directory
WORKDIR /usr/src/app

# add `/usr/src/app/node_modules/.bin` to $PATH
ENV PATH /usr/src/app/node_modules/.bin:$PATH

# install and cache app dependencies
COPY package.json /usr/src/app/package.json
RUN npm install

CMD ng serve --host 0.0.0.0 --poll 1

Dockerfile for running ng serve inside a container.