fix: COPY app.py into Docker image (was using GitHub clone, not our custom version)

Dockerfile

@@ -63,6 +63,7 @@ RUN . /opt/conda/etc/profile.d/conda.sh && conda activate musev && \
     python -c "import gdown; gdown.download(id='154JgKpzCPW82qINcVieuPH3fZ2e0P812', output='models/face-parse-bisent/79999_iter.pth', quiet=False)" && \
     echo "All models downloaded"
 
+COPY --chown=user:user app.py /home/user/app/MuseTalk/app.py
 COPY --chown=user:user entrypoint.sh /home/user/app/MuseTalk/entrypoint.sh
 RUN chmod +x /home/user/app/MuseTalk/entrypoint.sh