How to optimize application deployment time in Docker?

• Use multi-stage builds to reduce the final image size.
• Cache layers: place instructions that change infrequently (e.g., dependencies installation) at the beginning of the Dockerfile.
• Remove unnecessary files and dependencies in the final image.

• Use a private Docker Registry to speed up image retrieval.
• Local caching of images.

• Use Docker Compose for orchestrating multiple services with partial build capabilities.
• Implement CI/CD pipelines with optimized build and deployment steps.
• Parallel image building when using multiple Dockerfiles.
• Cache PHP dependencies using Composer install with the --no-dev --optimize-autoloader flag.

# Example of multi-stage build
FROM php:8.2-fpm-alpine AS builder

WORKDIR /app

COPY composer.json composer.lock ./
RUN composer install --no-dev --optimize-autoloader

COPY . .

FROM php:8.2-fpm-alpine as runner

WORKDIR /app

COPY --from=builder /app /app

CMD ["php-fpm"]

• Use faster file systems for storing images and data.
• Reduce the number of layers in the image.