Docker containerization in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the base image for a NestJS Docker container.

NestJS

FROM [1]

Drag options to blanks, or click blank then click option'

Aubuntu:latest

Bpython:3.12

Cnode:18-alpine

Dnginx:alpine

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a base image that does not have Node.js installed.

Using a heavy image like full Ubuntu unnecessarily.

The base image node:18-alpine is a lightweight Node.js image suitable for NestJS apps.

2fill in blank

medium

Complete the code to copy the NestJS application files into the Docker image.

NestJS

COPY [1] /app

Drag options to blanks, or click blank then click option'

A.

Bpackage.json

Cdist

Dnode_modules

Attempts:

3 left

💡 Hint

Common Mistakes

Copying only package.json without source files.

Copying node_modules which should be installed inside the container.

Copying . copies all files from the current directory into the image's /app folder.

3fill in blank

hard

Fix the error in the Dockerfile command to install dependencies.

NestJS

RUN npm [1]

Drag options to blanks, or click blank then click option'

Astart

Binstall

Cbuild

Dtest

Attempts:

3 left

💡 Hint

Common Mistakes

Using npm start which runs the app, not installs packages.

Using npm build which is not a valid npm command.

The command npm install installs all dependencies listed in package.json.

4fill in blank

hard

Fill both blanks to expose the correct port and set the working directory.

NestJS

WORKDIR [1]
EXPOSE [2]

Drag options to blanks, or click blank then click option'

A/app

B3000

C/usr/src/app

D8080

Attempts:

3 left

💡 Hint

Common Mistakes

Exposing port 8080 which is not the default NestJS port.

Setting working directory to a folder not used in the Dockerfile.

The working directory is set to /app where the app files are copied. NestJS default port is 3000.

5fill in blank

hard

Fill all three blanks to run the NestJS app in production mode.

NestJS

CMD ["npm", "[1]", "[2]", "[3]"]

Drag options to blanks, or click blank then click option'

Arun

Bstart

Cprod

Dtest

Attempts:

3 left

💡 Hint

Common Mistakes

Using npm start without run keyword.

Using test instead of prod for production.

The command npm run start prod starts the NestJS app in production mode.