Docker containerization in Remix - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the base image in a Dockerfile.

Remix

FROM [1]

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Anode:18-alpine

Bpython:3.9

Cmysql:8

Dubuntu:latest

Attempts:

3 left

💡 Hint

Common Mistakes

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

Choosing a heavy image that slows down the build.

The FROM instruction sets the base image for the Docker container. For Remix apps, a lightweight Node.js image like node:18-alpine is common.

2fill in blank

medium

Complete the Dockerfile command to copy the app files into the container.

Remix

COPY [1] /app

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Adist

Bnode_modules

Cpackage.json

D.

Attempts:

3 left

💡 Hint

Common Mistakes

Copying only package.json without source files.

Copying node_modules which should be installed inside the container.

The COPY . /app command copies all files from the current directory into the container's /app folder.

3fill in blank

hard

Fix the error in the Dockerfile command to install dependencies.

Remix

RUN npm [1]

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Ainstall

Bstart

Cbuild

Dtest

Attempts:

3 left

💡 Hint

Common Mistakes

Using npm start which runs the app instead of installing.

Using npm build which is not a valid npm command.

The RUN npm install command installs all dependencies listed in package.json inside the container.

4fill in blank

hard

Fill both blanks to expose the correct port and set the command to start the Remix app.

Remix

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

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Astart

B3000

Cbuild

D8080

Attempts:

3 left

💡 Hint

Common Mistakes

Exposing the wrong port like 8080.

Using npm build instead of npm start.

The Remix app usually runs on port 3000, so EXPOSE 3000 makes that port accessible. The command npm start runs the app inside the container.

5fill in blank

hard

Fill all three blanks to create a multi-stage Dockerfile that builds and runs the Remix app efficiently.

Remix

FROM node:18-alpine AS builder
WORKDIR /app
COPY [1] /app
RUN npm [2]
RUN npm run [3]

FROM node:18-alpine
WORKDIR /app
COPY --from=builder /app /app
CMD ["npm", "start"]

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

A.

Binstall

Cbuild

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Copying only package.json in the build stage.

Skipping the build step.

Using npm start in the build stage instead of npm run build.

This multi-stage Dockerfile first copies all files, installs dependencies, and builds the Remix app in the builder stage. Then it copies the built app to a clean image and starts it.