feat: Add Docker setup to bypass test interference issues (fixes #12163)

[Vallabh-Mahanta]

 I've created a Docker solution to fix this issue. You can find the solution at:
 https://github.com/Vallabh-Mahanta/medusa/tree/feat/docker-local-development-12163

 The solution includes:
 - A DOCKER.md file with setup instructions
 - A docker-compose.yml configuration that prevents test file interference

 GitHub is preventing me from creating a PR due to "entirely different commit histories" but the solution works and resolves the issue.

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