Claude Code: fix Dockerfile to run app.py instead of main.py

The Dockerfile was running the minimal main.py stub instead of the
actual FastAPI application in app.py with health check endpoints.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -6,10 +6,10 @@ WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY main.py .
+COPY app.py .
 COPY openclaw.json .
 
 ENV PORT=7860
 EXPOSE 7860
 
-CMD ["python", "main.py"]
+CMD ["python", "app.py"]