Update Dockerfile

Dockerfile

@@ -1,12 +1,12 @@
-#Grab python=3.7-slim-buster image
-FROM python:3.7-slim-buster
+#Grab python=3.9-slim-buster image
+FROM python:3.9-slim-buster
 
 # Copy code to container
 COPY app /app
 
 # RUN apt-get update
-RUN apt-get update && apt-get install -y build-essential wget python3-dev python3-pip gcc sudo
-# openldap-dev libffi-dev jpeg-dev zlib-dev libmemcached-dev gcc libc-dev g++ libxml2 libxslt libxslt-dev
+RUN apt-get update && apt-get install -y gcc libc-dev g++ llibc6-dev dpkg-dev build-essential wget python3-dev python3-pip gcc sudo
+# openldap-dev libffi-dev jpeg-dev zlib-dev libmemcached-dev ibxml2 libxslt libxslt-dev
 
 # TA-Lib
 # RUN wget http://prdownloads.sourceforge.net/ta-lib/ta-lib-0.4.0-src.tar.gz