Implement CD pipeline

[njogz]

Describe the issue
Right now the process of deploying new versions of the mediator is very manual and involves creating a new Docker image that is pushed to docker hub and then manually deployed via Kubernetes.

Describe the improvement you'd like
The deployment process can be automated in continuous deployment workflow to ensure new versions are deployed in a fast, efficient and less error prone manner

Describe alternatives you've considered
None.

Tasks

• Set up Github Action to automatically build a Docker image when a commit is made on the main branch
• Push the new image to docker hub
• Set up a process for updating the image being run by the kubernetes cluster to the new image

[Phil-Mwago]

@njogz should we move this to in-progress column?

[njogz]

@Phil-Mwago yes. It can move back to the in-progress column.