updated requirements with specific versioning

[totallynotmanas]

This PR optimizes the build configuration and Docker setup to enhance reliability, performance, and long-term maintainability. Key focus areas include image size reduction, cross-engine support (Docker/Podman), and build reproducibility.

Changes

Dockerfile

• Optimization: Added ENV PIP_NO_CACHE_DIR=1 to minimize image footprint.

• Stability: Improved package installation by upgrading pip, setuptools, and wheel.

• Security: Added ca-certificates for robust SSL/TLS support.

• Caching: Optimized layer caching by moving the requirements.txt copy step before volpe_py.

• Readability: Cleaned up command formatting and simplified the CMD entry point.

build_image.sh

• Robustness: Added proper bash shebang and strict error handling (set -euo pipefail).

• Compatibility: Implemented automatic Docker/Podman detection with validation logic to error out if no container engine is found.

• Safety: Improved variable quoting for paths with spaces and switched to rm -f for fail-safe cleanups.

requirements.txt

• Reproducibility: Added version constraints for grpcio-tools>=1.78.1 and protobuf>=6.31.0 to prevent breaking changes in future builds.

[aadit-n3rdy]

Hey, looks good overall, but it just struck me that we should probably fix the protobuf version across the entire project, would be great if you could use "==" for protobuf, and set the same version across all the repos where it's used. Will discuss this on WA.