Consistent environments across teams in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Dockerfile to specify the base image.

Docker

FROM [1]

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

Aubuntu:latest

Bpython:3.12-slim

Cnode:14-alpine

Dalpine:3.15

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a base image with a different Python version.

Using a non-Python base image.

The base image python:3.12-slim ensures a consistent Python 3.12 environment across teams.

2fill in blank

medium

Complete the Dockerfile to copy the application code into the container.

Docker

COPY [1] /app

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

Aapp/

Bsrc/

C.

Dcode/

Attempts:

3 left

💡 Hint

Common Mistakes

Copying a wrong folder that doesn't contain the app code.

Using an incorrect path that causes build errors.

Using COPY . /app copies the current directory contents into the container's /app folder.

3fill in blank

hard

Fix the error in the Dockerfile command to install dependencies.

Docker

RUN pip install -r [1]

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

Apackages.txt

Brequirements

Cdeps.txt

Drequirements.txt

Attempts:

3 left

💡 Hint

Common Mistakes

Using a filename without extension.

Using a non-standard filename that pip won't recognize.

The standard file for Python dependencies is requirements.txt. Using this ensures pip installs the correct packages.

4fill in blank

hard

Fill both blanks to expose the container port and set the default command.

Docker

EXPOSE [1]
CMD ["[2]"]

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

A8080

Bpython

C5000

Dnode

Attempts:

3 left

💡 Hint

Common Mistakes

Exposing a wrong port that the app doesn't listen on.

Using a command that doesn't start the Python app.

Port 8080 is commonly used for web apps. The command python starts the Python interpreter or script.

5fill in blank

hard

Fill all three blanks to create a Docker Compose service for the app.

Docker

services:
  web:
    image: [1]
    ports:
      - "[2]:[3]"

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

Amyapp:latest

B8080

C80

D5000

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect port mappings that prevent access.

Using an image name without a tag.

The service uses the image myapp:latest. It maps port 8080 on the host to port 80 in the container, a common web port.