DevOps Classroom notes 12/May/2026

Creating Docker Images

• Creating docker images can be done
  • Interactively
  • By specifying instructions in a file

Interactively – Lets create a docker image for a website

• To create a website we need to have
  • web server
  • web design
• Lets create a docker container with nginx image

docker run -d --name web1 -p 80:80 nginx

• Now download a zip file and extract

mkdir website
cd website/
wget https://templatemo.com/tm-zip-files-2020/templatemo_623_novapay.zip
ls
unzip templatemo_623_novapay.zip
ls
cd templatemo_623_novapay/

• We can copy contents of folder from host into container

docker cp . web1:/usr/share/nginx/html/

• Now access docker container by using ip of the server
  
• Now lets save the image of this contianer

docker commit web1 novapay
docker image ls

• Now remove the continaer docker rm -f web1 and create a new contianer with novapay image

docker run -d --name web2 -p 80:80 novapay

• Remove the contiainer

docker rm -f web2

• this approach works but requires lot of manual steps for creating image thats where we have docker instruction based image creation which is referred as Dockerfile