Multi-stage builds for static sites in Nginx - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a multi-stage build in Docker?

A multi-stage build is a Docker technique that uses multiple FROM statements in one Dockerfile to create smaller, optimized images by separating build and runtime environments.

beginner

Why use multi-stage builds for static sites?

Multi-stage builds help keep the final image small by only including the static files needed to serve the site, removing build tools and dependencies.

intermediate

In a multi-stage build for a static site, what is typically done in the first stage?

The first stage usually installs dependencies and builds the static site files using tools like npm or yarn.

beginner

What role does nginx play in multi-stage builds for static sites?

Nginx serves the static files in the final stage, providing a lightweight and fast web server environment.

intermediate

How does a multi-stage Dockerfile improve security for static sites?

By excluding build tools and source code from the final image, it reduces the attack surface and potential vulnerabilities.

What is the main benefit of using multi-stage builds for static sites?

A Smaller final image size

B Faster build times

C More layers in the image

D Includes all build tools in the final image

Multi-stage builds reduce the final image size by only copying necessary files to the last stage.

Which tool is commonly used to serve static sites in the final stage of a multi-stage build?

A Apache

B Node.js

C Nginx

D MySQL

Nginx is a lightweight web server often used to serve static files efficiently.

In a multi-stage Dockerfile, what does the first stage usually contain?

A Final runtime environment

B Static files only

C Nginx configuration

D Build tools and source code

The first stage installs dependencies and builds the static site.

How does multi-stage building affect security?

A Increases attack surface

B Reduces vulnerabilities by excluding build tools

C Includes all source code in the final image

D Requires more permissions

Excluding build tools and source code reduces the attack surface.

Which Dockerfile instruction is used to copy files from one stage to another?

A COPY --from

B RUN

C ADD

D ENV

COPY --from allows copying files from a previous build stage.

Explain how a multi-stage Docker build works for creating a static site with nginx.

Think about separating build and runtime environments.

Describe the advantages of using multi-stage builds for static sites in terms of performance and security.

Consider what is included and excluded in the final image.