Update Dockerfile

Dockerfile

@@ -4,14 +4,14 @@ RUN mkdir -p /app/db && \
     touch /app/db/config.txt && \
     cp /app/templete.env /app/db/user.env 2>/dev/null || true
 
-RUN pip3 install gunicorn 2>/dev/null || true
-
 ENV PORT=7860
 ENV TZ=Asia/Shanghai
 ENV FLASK_APP=server
+ENV FLASK_RUN_HOST=0.0.0.0
+ENV FLASK_RUN_PORT=7860
 
 EXPOSE 7860
 
 WORKDIR /app
 
-CMD ["gunicorn", "--bind", "0.0.0.0:7860", "server:app"]
+CMD ["flask", "run", "--host=0.0.0.0", "--port=7860"]