fix: remove stale COPY config from Dockerfile 🐛

Root config/ directory was removed when the duplicate config/app.yml was
deleted — the canonical config is now bundled inside directdnsonly/config/
and is already covered by the existing COPY directdnsonly step.

Dockerfile

@@ -28,7 +28,6 @@ RUN pip install "poetry==2.1.2"  # Adjust version to match your lock file
 
 # Copy application files
 COPY directdnsonly ./directdnsonly
-COPY config ./config
 COPY schema ./schema
 
 RUN poetry config virtualenvs.create false && \