Backend fixes:
- Add g++ and build-essential for complete C++ compilation support
- Upgrade pip, setuptools, and wheel before installing dependencies
- Ensures psutil and other packages with native extensions build correctly
Frontend fixes:
- Add build arguments for NEXT_PUBLIC_API_URL and NEXT_PUBLIC_WS_URL
- Pass environment variables during Docker build stage
- Set default values to prevent undefined destination in Next.js rewrites
- Configure docker-compose to pass build arguments to frontend service
These changes resolve:
- psutil build failure: "ERROR: Failed building wheel for psutil"
- Next.js build error: "Invalid rewrite found" with undefined destination
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