Add unified dockerfile

[rcvalerio]

This PR adds a new Dockerfile that allows launching the task-runner and file-tracker in the same container

@hpenedones this are the commands I used to test:

docker build -f Dockerfile -t task-runner-unified .
docker run -d --name task-runner-unified --network host --privileged --add-host host.docker.internal:host-gateway -e EXECUTER_IMAGES_DIR=/executer-images -e API_URL=$INDUCTIVA_API_URL -e USER_API_KEY=$INDUCTIVA_API_KEY -e MACHINE_GROUP_NAME=$MACHINE_GROUP_NAME -e HOST_NAME=${TASK_RUNNER_HOSTNAME:-${HOSTNAME}} -v workdir:/workdir -v $(pwd)/apptainer:/executer-images task-runner-unified

• Should we include a Makefile rule and mention the unified image in the README.md? UPDATE: done
• Should we push the task-runner-unified image to dockerhub? UPDATE: done

[hpenedones]

Thanks for this Rodrigo!
Yes, ideally we would push the task-runner-unified image to dockerhub, so that we can then experiment with launching both services from a single image.

[rcvalerio]

Thanks for this Rodrigo! Yes, ideally we would push the task-runner-unified image to dockerhub, so that we can then experiment with launching both services from a single image.

Should we have a github action to push the image to dockerhub @bgregoinductiva ?

[bgregoinductiva]

Thanks for this Rodrigo! Yes, ideally we would push the task-runner-unified image to dockerhub, so that we can then experiment with launching both services from a single image.

Should we have a github action to push the image to dockerhub @bgregoinductiva ?

Yes, please extend the current workflow.

Should we include a Makefile rule and mention the unified image in the README.md?

Please do this as well.

[rcvalerio]

New changes:

• Github action to push to dockerhub;
• New makefile rule: make task-runner-unified-up;
• Updated README.md