Adding support for publishing images to ECR using Github actions. https://trello.com/c/mCSVqNIZ/642-implement-github-actions-as-ci-pipeline
Adding support for publishing images to ECR using Github actions.
https://trello.com/c/mCSVqNIZ/642-implement-github-actions-as-ci-pipeline

A new Github workflow has been added, which will publish images to ECR tagged with Github sha.
Images will be built on both PR and merge to Main.

The build relies on a Github organisational secret being accessible to this repo:
`AWS_GOVUK_ECR_ACCESS_KEY_ID`
`AWS_GOVUK_ECR_SECRET_ACCESS_KEY`

alphagov/router