Setup Docker - lakshmansha/ExpressChatApp Wiki

The Setup Steps are

#  Create a new image from the base nodejs 12.7 image.
FROM node:12.7-alpine
# Create the target directory in the image
RUN mkdir -p /usr/src/app
# Set the created directory as the working directory
WORKDIR /usr/src/app
# Copy the package.json inside the working directory
COPY ./package.json /usr/src/app
# Install required dependencies
RUN  npm install;

# Copy the client application source files. You can use .dockerignore to exlcude files. Works just as .gitignore does.
COPY ./ /usr/src/app
# Open port 3000. This is the port that our development server uses
# Start the application. This is the same as running ng serve.
CMD ["npm", "run", "start:dev"]

Step 3:

Created Run the API Container with mapping the created network using below Command:

docker build -t expresschatapp:dev -f Dockerfile.Dev .
docker run --network dockernet --env-file docker.env -it --rm -p 3000:3000 -v ${PWD}/src:/usr/app/src --name expresschatapp expresschatapp:dev