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Setting up multiple apache2 instances on Ubuntu 16.04

PHP handling on apache is done via modules of one sort or another, and running multiple version is problematic on a single instance. The solution is to run two instances of apache on the same machine. This allows one instance to run PHP 7 (the default on 16.04), and another can run PHP 5. Since normal http/https is on ports 80 and 443, the second instance will run on ports 81 and 444. Since it is running on the same machine, all file system and database access is the exact same.

All the commands herein have to be run as root, or with sudo prefixed to the command.

Read /usr/share/doc/apache2/README.multiple-instances
Run sh ./setup-instance php5 from /usr/share/doc/apache2/examples, where php5 is the suffix for the second site; all commands for the second site will have that suffix. This will keep all of the same configuration for all sites on the new instance, including SSL certif

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>MediaCapture and Streams API</title>
	<meta name="viewport" content="width=device-width">
	<link rel="stylesheet" href="main.css">
	</head>
	<body>
	<header>

	FROM php:7.2-fpm

	# Replace shell with bash so we can source files
	RUN rm /bin/sh && ln -s /bin/bash /bin/sh

	# make sure apt is up to date
	RUN apt-get update --fix-missing
	RUN apt-get install -y curl
	RUN apt-get install -y build-essential libssl-dev zlib1g-dev libpng-dev libjpeg-dev libfreetype6-dev

	server {
	listen 80;
	listen [::]:80; #Use this to enable IPv6
	server_name www.example.com;
	root /var/www/prestashop17;
	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log;

	index index.php index.html;