Add Python (and pip) to Dockerfile for dependency installation (#433)

[CoderRahul9904]

While following the setup steps in doc.md, some dependencies failed to install because Python was missing in the Docker container. Certain Node packages (via node-gyp and similar tools) require Python and pip during their build process.

This PR updates the Dockerfile to install:

1. python3 – Python interpreter
2. py3-pip – Python package installer
3. py3-setuptools – Required for Python packaging
4. build-base – Compilation tools for native modules

These additions ensure that Python-based build dependencies can be installed without manual intervention.

Changes:

• Updated apk add step in Dockerfile to include py3-pip.

Testing:

• Built the Docker image locally and verified that packages requiring Python now install successfully.

Closes: #433