Multi-stage for different environments in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Dockerfile line to specify the base image for the build stage.

Docker

FROM [1] AS build

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

Anode:14

Bubuntu:latest

Cpython:3.9

Dalpine:3.15

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a base image that is not suitable for building Node.js apps.

The build stage uses the Node.js 14 image as the base to compile the application.

2fill in blank

medium

Complete the Dockerfile line to copy only production dependencies in the final stage.

Docker

COPY --from=build /app/[1] ./

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Anode_modules

Bpackage.json

Csrc

Ddist

Attempts:

3 left

💡 Hint

Common Mistakes

Copying source code instead of dependencies.

Copying 'node_modules' from the build stage ensures only production dependencies are included.

3fill in blank

hard

Fix the error in the Dockerfile line that sets the environment variable for production.

Docker

ENV NODE_ENV=[1]

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Adevelopment

Btest

Cproduction

Dstaging

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'development' or 'test' instead of 'production'.

Setting NODE_ENV to 'production' ensures the app runs in production mode.

4fill in blank

hard

Fill both blanks to complete the multi-stage Dockerfile for build and production stages.

Docker

FROM [1] AS build
FROM [2] AS production

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

Anode:16

Bnode:alpine

Cpython:3.10

Dubuntu:20.04

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same image for both stages or using unrelated images.

The build stage uses the full Node 16 image, while the production stage uses a smaller Alpine image for efficiency.

5fill in blank

hard

Fill all three blanks to complete the Dockerfile snippet that copies build output and sets the command.

Docker

COPY --from=[1] /app/[2] ./
CMD ["[3]"]

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

Abuild

Bdist

Cnode

Dsrc

Attempts:

3 left

💡 Hint

Common Mistakes

Copying from wrong stage or folder, or using wrong command.

Copy from the 'build' stage the 'dist' folder and run the app using 'node' command.