Create github action to build and test docker image for prototype kit

[poornima-krishnasamy]

Background

We have the moj-prototype-template which hold the copy of gov.uk prototype kit. To ensure the Dockerfile and docker image is build and tested whenever the prototype kit version is updated in line with latest release here: https://github.com/alphagov/govuk-prototype-kit, create an automatic way to test the docker build.

Approach

One approach to create a github action to build and push to docker and have a demo repository to deploy the image

Which part of the user docs does this impact

https://github.com/ministryofjustice/moj-prototype-template https://github.com/ministryofjustice/cloud-platform-prototype-demo

Definition of done

• [ ] That the docker build is successful
• [ ] That the build image can be run successfully
• [ ] readme has been updated
• [ ] user docs have been updated
• [ ] another team member has reviewed
• [ ] smoke tests are green

Reference

How to write good user stories

[poornima-krishnasamy]

Find a way to trace the https://github.com/alphagov/govuk-prototype-kit releases

Add runbook to explain the steps CP team has to do to update the kit for latest release, test the build and deploy process while being in the branch. Utilize branch based deployment to test the latest release.