Docker โ packaging your app into a 'box' (container). Fixes 'works on my machine' issue.
Key concepts
Image โ template. Container โ running instance. Dockerfile โ recipe.
First container
docker run -d -p 8080:80 nginx โ nginx running in 5 seconds.
WordPress + MySQL
docker-compose.yml with 2 services. up -d โ WP in 1 minute.