Update Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.9-slim
+FROM python:3.8.5
 
 WORKDIR $HOME/app
 
@@ -7,8 +7,8 @@ RUN apt-get update && apt-get upgrade -y && apt-get install gcc -y
 RUN pip3 install --no-cache-dir -r /app/requirements.txt
 RUN pip3 install numpy
 RUN pip3 install cython==0.29.21
-RUN apt-get update
-RUN apt-get install --reinstall build-essential -y
+#RUN apt-get update
+#RUN apt-get install --reinstall build-essential -y
 RUN pip3 install pygco==0.0.16
 
 RUN useradd -m -u 1000 user