update python image to 3.11.6-alpine- Update Dockerfile

Dockerfile

@@ -1,5 +1,5 @@
 #FROM python:3
-FROM python:3.8.6-alpine
+FROM python:3.11.6-alpine
 # use python:3.11.0rc2-slim for less vulnerabilities ? (from `docker scan`)
 # use python:3.8.6 for no pip dependencies build errors ?
 # use python:alpine for reduced size