Docker Build Tutorial: Learn Contexts, Architecture, and Performance Optimization Techniques

Docker build is the process of creating container images from Dockerfiles and build contexts. The architecture uses two components: Buildx (client interface) and BuildKit (build engine) that communicate through on-demand file transfers for efficiency. Build contexts can be local directories, Git repositories, or remote tarballs. Common mistakes include wrong context directories, including massive unnecessary files, and inefficient layer caching. Optimization techniques include using .dockerignore files, multi-stage builds, specific base images, proper layer ordering for cache reuse, and combining RUN commands. The guide covers troubleshooting build issues, measuring performance metrics, and implementing security best practices with build secrets.