update Dockerfile for start app

Dockerfile

@@ -1,11 +1,13 @@
 from debian:12.11
 
+EXPOSE 7860
+
 RUN apt -y update
 
 RUN apt-get update && apt-get install -y python3 python3-pip
 RUN python3 --version
 RUN pip --version
 
-RUN echo "[SERVER WORK ONLINE]" > keepalive.log
+RUN pip install "fastapi[standard]"
 
-CMD tail -f keepalive.log
+CMD gunicorn main:app --workers 4 --worker-class uvicorn.workers.UvicornWorker --bind 0.0.0.0:7860