Make docker image available at docker hub

[palmjulia]

The docker Image should be availabe for sites that are not able to build themselves. As an intermin solution @joundso uploded the image under his dockerhub account , but there should probably be one under the maintainers (@NandhiniS08 ) account.

You can use the code from #2 , modify it accordingly and merge it into the master.

Necessary steps for this would be:

• Create a DockerHub account
• Change REGISTRY_PREFIX .env-file
• Run build_and_push_image.sh
• Update Readme and docker-compose to new Image <REGISTRY_PREFIX>/projectathon6-miracum1

Thanks @joundso for the help!

[NandhiniS08]

Docker image available in docker hub account @NandhiniS08