How can I reduce the size of my Docker images?

How can I reduce the size of my Docker images?

You can reduce Docker image sizes by using multi-stage builds, minimizing layers, and choosing smaller base images.

What are multi-stage builds?

Multi-stage builds allow you to use multiple FROM statements in your Dockerfile, enabling you to copy only the necessary artifacts to the final image.

Can you give me an example of a multi-stage Dockerfile?

Sure! Here's a simple example:

# First stage: build the application
FROM node:14 AS build
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build

# Second stage: create the final image
FROM nginx:alpine
COPY --from=build /app/build /usr/share/nginx/html