Hot reloading with bind mounts in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Docker run command to mount the current directory into the container for hot reloading.

Docker

docker run -v [1]:/app myapp

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

A$(pwd)

B/home/user

C/var/www

D/app

Attempts:

3 left

💡 Hint

Common Mistakes

Using a fixed path instead of the current directory

Forgetting to mount the directory

Mounting the wrong directory

The command uses $(pwd) to mount the current directory into /app inside the container, enabling hot reloading.

2fill in blank

medium

Complete the docker-compose volume syntax to bind mount the local src folder to /app/src in the container.

Docker

volumes:
  - [1]:/app/src

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

A/src

B/var/src

C/app/src

D./src

Attempts:

3 left

💡 Hint

Common Mistakes

Using absolute paths that don't exist locally

Mounting to the wrong container path

Omitting the local folder path

Using ./src binds the local src folder to /app/src inside the container for hot reloading.

3fill in blank

hard

Fix the error in this Dockerfile command to copy source files for hot reloading.

Docker

COPY [1] /app

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

A./src

Bsrc/

C/src

Dapp/src

Attempts:

3 left

💡 Hint

Common Mistakes

Using absolute paths starting with /

Using incorrect folder names

Omitting trailing slash when needed

Using 'src/' correctly copies the source folder contents into /app in the container.

4fill in blank

hard

Fill both blanks to complete the docker-compose service for hot reloading with bind mounts.

Docker

services:
  web:
    volumes:
      - [1]:[2]

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

A./app

B/app

C/usr/src/app

D./src

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping local and container paths

Using absolute local paths

Mounting wrong folders

The local './src' folder is bind mounted to '/usr/src/app' in the container for hot reloading.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that watches files for changes and triggers reload.

Docker

reload_map = { [1]: [2] for [3] in files if changed([3]) }

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

Afile

BTrue

Cfiles

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names

Incorrect comprehension syntax

Missing the condition

The comprehension maps each file to True if it has changed, triggering reload.