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Docker Build

Build images fast with BuildKit, tags, build args, and cache.

  • docker build
  • buildkit
  • build arg
  • dockerignore
  • multi-stage

Docker Build

Build images fast with BuildKit, tags, build args, and cache.

Commands

CommandWhat it does
docker build -t app:v1 .Build with a tag from current dir
docker build --target prod -t app:v1 .Build one multi-stage target
docker build --build-arg VERSION=1.3 .Pass a build-time variable
docker build --no-cache -t app:v1 .Force a clean rebuild
docker history app:v1See layer sizes to find bloat

Example

DOCKER_BUILDKIT=1 docker build --target prod -t registry/app:v1.3 .
docker history registry/app:v1.3 | head

FAQ

Why is my build slow?

Large contexts: add a .dockerignore (node_modules, .git) so the daemon receives kilobytes, not gigabytes.

How do build args differ from env?

ARG exists only at build time; use ENV (or --env at run) for runtime configuration.

الأسئلة الشائعة

Why is my build slow?
Large contexts: add a .dockerignore (node_modules, .git) so the daemon receives kilobytes, not gigabytes.
How do build args differ from env?
ARG exists only at build time; use ENV (or --env at run) for runtime configuration.

Docker

Docker Install and Setup
Verify the Docker engine, configure context, and check versions.
Docker Images
Pull, list, tag, inspect, and remove images confidently.
Docker Containers
Run, list, stop, and clean up containers in daily work.
Docker Run Options
The flags that matter: detach, ports, env, volumes, limits.