Remove redundant COPY config/ from Dockerfile, add config copy to setup

Config is volume-mounted in docker-compose, making the COPY unnecessary
and causing build failures when config/ is gitignored.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -14,7 +14,6 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy application code
 COPY src/ ./src/
-COPY config/ ./config/
 
 # Create non-root user for security
 RUN useradd -m -u 1000 appuser && \