Upgrade to python 3.9

Author: mxmeinhold

.github/workflows/python-app.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.9]
 
     steps:
       - name: Install ldap dependencies

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.7-slim-buster
+FROM python:3.9-slim-buster
 MAINTAINER Devin Matte <matted@csh.rit.edu>
 
 ENV DD_LOGS_INJECTION=true

README.md

@@ -1,14 +1,14 @@
 # CSH Web Packet
 
-[![Python 3.7](https://img.shields.io/badge/python-3.7-blue.svg)](https://www.python.org/downloads/release/python-370/)
+[![Python 3.9](https://img.shields.io/badge/python-3.9-blue.svg)](https://www.python.org/downloads/release/python-390/)
 [![Build Status](https://travis-ci.com/ComputerScienceHouse/packet.svg?branch=develop)](https://travis-ci.com/ComputerScienceHouse/packet)
 
 Packet is used by CSH to facilitate the freshmen packet portion of our introductory member evaluation process. This is 
 the second major iteration of packet on the web. The first version was 
 [Tal packet](https://github.com/TalCohen/CSHWebPacket).
 
 ## Setup
-**Requires Python 3.7 or newer.**
+**Requires Python 3.9 or newer.**
 
 To get the server working you'll just need the Python dependencies and some secrets. There will be some UI issues due 
 to missing assets though. To solve that you'll want to set up the front end dependencies or download a copy of the