Github Actions for publishing Docker images to Docker Hub

[prabhuomkar]

Docker Images should be built using 2 step process to reduce the image size:

• [x] API - https://github.com/prabhuomkar/iris/commit/111ebc8fd51ac1eaf0d63f6a700e6d09c99c48f3
• [x] Worker - #111

Docker Images will be named as follows:

• Frontend: prabhuomkar/iris-frontend:<tag>
• GraphQL: prabhuomkar/iris-graphql:<tag>
• Worker: prabhuomkar/iris-worker:<tag>
• ML: prabhuomkar/iris-ml:<tag>