Merge pull request #195 from devinmatte/python3.7

Upgrading to python 3.7 and shrinking docker build

Author: devinmatte

.travis.yml

@@ -1,6 +1,6 @@
 language: python
 python:
-  - "3.6"
+  - "3.7"
 
 install:
   - "pip install -r requirements.txt"

Dockerfile

@@ -1,29 +1,31 @@
-FROM python:3.6-stretch
+FROM python:3.7-slim-buster
 MAINTAINER Devin Matte <matted@csh.rit.edu>
 
-RUN mkdir /opt/packet
+RUN apt-get -yq update && \
+    apt-get -yq --no-install-recommends install gcc curl libsasl2-dev libldap2-dev libssl-dev && \
+    apt-get -yq clean all
 
-ADD requirements.txt /opt/packet
+RUN mkdir /opt/packet
 
 WORKDIR /opt/packet
 
-RUN apt-get -yq update && \
-    apt-get -yq --allow-unauthenticated install libsasl2-dev libldap2-dev libssl-dev && \
-    pip install -r requirements.txt && \
-    apt-get -yq clean all
+COPY requirements.txt /opt/packet
+
+RUN pip install -r requirements.txt
 
-ADD . /opt/packet
+COPY . /opt/packet
 
 RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - && \
     curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
     echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
     apt-get -yq update && \
-    apt-get -yq install nodejs npm yarn && \
+    apt-get -yq --no-install-recommends install nodejs yarn && \
     yarn install && \
     npm install -g gulp && \
     gulp production && \
     rm -rf node_modules && \
     apt-get -yq remove nodejs npm yarn && \
+    apt-get -yq autoremove && \
     apt-get -yq clean all
 
 RUN ln -sf /usr/share/zoneinfo/America/New_York /etc/localtime

README.md

@@ -1,14 +1,14 @@
 # CSH Web Packet
 
-[![Python 3.6](https://img.shields.io/badge/python-3.6-blue.svg)](https://www.python.org/downloads/release/python-360/)
+[![Python 3.7](https://img.shields.io/badge/python-3.7-blue.svg)](https://www.python.org/downloads/release/python-370/)
 [![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 3.6 or newer.**
+**Requires Python 3.7 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