Splits the monolithic TA-Lib build RUN command to insert an ARG for the
expected SHA256 hash and a sha256sum -c verification step immediately after
the wget download, before extraction and build. Marks task 6.5 complete.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Updated the wget command in services/ml/Dockerfile line 10 to use HTTPS instead of HTTP for downloading TA-Lib source. This improves security by ensuring encrypted transport.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Create system user appuser with useradd, set ownership of /app,
and switch to non-root user before CMD to reduce container attack surface.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
