Update Dockerfile

Dockerfile

@@ -2,6 +2,11 @@ FROM python:3.9
 
 WORKDIR /code
 
+COPY packages.txt .
+RUN apt-get update && \
+    xargs -r -a packages.txt apt-get install -y --no-install-recommends && \
+    rm -rf /var/lib/apt/lists/*
+
 COPY ./requirements.txt /code/requirements.txt
 
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt