Jenkins

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -

Then add the following entry in your /etc/apt/sources.list:

deb https://pkg.jenkins.io/debian-stable binary/

sudo apt-get update && sudo apt-get install jenkins

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

copy the password

open localhost:8080

do first time setup using the the above generated password

Let it auto select plugins

Create new job

select freestyle project

( have it public and add credentials)

create cron schedule using www.cronmaker.com // (* * * * *)

  docker build -t my-flask-image:latest .

sudo groupadd docker

sudo groupadd docker

sudo usermod -aG docker jenkins

newgrp docker

sudo service jenkins restart

Make a new commit on git, wait for 1 min, jenkins will auto build

check docker images for a newly created image

$ docker run <image_name>