Docker image of Mantis on ghcr.io is slow on ARM based machines #90

Describe the bug

When I setup Mantis using Docker on ARM based Ubuntu Machine, all the commands run extremely slowly.

To Reproduce

On an ARM based Linux system, pull and run the Mantis docker

docker pull ghcr.io/phonepe/mantis:latest
docker run --rm mantis:latest 

Run any command inside the running Docker container and notice they are executed extremely slow.

Possible fix

Modify the release for Mantis to push Docker image of Mantis that supports multiple architectures. You can probably use docker buildx for building the docker image.