Fixed dockerfile

Dockerfile

@@ -1,11 +1,9 @@
 FROM python:3.9-slim
 
 ADD requirements.txt /app/
-WORKDIR /app/
 
-RUN pip3 install -r requirements.txt
+RUN pip3 install -r /app/requirements.txt
 
-ADD app.py /app/
+ADD reporter.py /app/
 
-EXPOSE 8000
-CMD ["gunicorn", "-b", "0.0.0.0:8000", "app:app"]
+CMD ["python3", "/app/reporter.py"]