adding dockerfile

dockerfile

@@ -0,0 +1,13 @@
+FROM python:3.9-slim-buster
+
+WORKDIR /app
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+
+CMD ["gunicorn", "app:app", "-b", "0.0.0.0:8000"]