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Docker Basics

Containers help keep local, CI, and production environments consistent.

Concepts to learn

  • Images vs containers
  • Layers and caching
  • Volumes and bind mounts
  • Port mapping
  • Environment injection
  • Multi-stage builds

Minimum workflow

  • Build image from Dockerfile
  • Run container with env variables
  • Persist local data with volumes
  • Use docker compose for multi-service apps

Resources