Docker Build demo

gistfile1.txt

#commands used for a docker build and run demo
echo "FROM ruby:2.7.4" >> Dockerfile
echo 'CMD ["ruby", "-e", "puts(\"hello container\")"]' >> Dockerfile
docker build .
#Gotta find id to run
docker run <id>
#Easier to tag and use tag
docker build . --tag my-ruby-app
docker run my-ruby-app

#Tags also support version
docker build . --tag my-ruby-app:1
sed -i ' ' 's/hello container/hola container/g' Dockerfile
docker build . --tag my-ruby-app:2
docker images
docker run my-ruby-app:1
docker run my-ruby-app:2
#will always pull latest
docker run my-ruby-app
sed -i ' ' 's/hola container/bonjour container/g' Dockerfile
docker build . --tag my-ruby-app:3  --tag my-ruby-app:latest
docker run my-ruby-app