Refactor Dockerfile to remove multi-stage build and streamline instal…

[javidahmed64592]

This pull request refactors the Dockerfile for the Python Template Server by simplifying the build process and dependency installation. The main change is the removal of the multi-stage build in favor of directly installing dependencies from the GitHub repository using uv. Additionally, Git is now installed in the runtime image to support dependency resolution.

Build process simplification:

• Removed the multi-stage build setup, including the builder stage and wheel build steps, to streamline the Dockerfile and reduce complexity.
• Replaced wheel installation with direct dependency installation from the GitHub repository using uv pip install --system git+https://github.com/javidahmed64592/python-template-server.git.

Dependency management:

• Added installation of Git in the runtime image to enable resolving dependencies directly from the GitHub repository.

Other changes:

• Cleaned up the Dockerfile by removing unused commands and comments related to the previous multi-stage build process.