Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/public/js/chartjs/utils.js

@@ -0,0 +1,147 @@
+'use strict';
+
+window.chartColors = {
+	red: 'rgb(255, 99, 132)',
+	orange: 'rgb(255, 159, 64)',
+	yellow: 'rgb(255, 205, 86)',
+	green: 'rgb(75, 192, 192)',
+	blue: 'rgb(54, 162, 235)',
+	purple: 'rgb(153, 102, 255)',
+	grey: 'rgb(201, 203, 207)'
+};
+
+(function(global) {
+	var Months = [
+		'January',
+		'February',
+		'March',
+		'April',
+		'May',
+		'June',
+		'July',
+		'August',
+		'September',
+		'October',
+		'November',
+		'December'
+	];
+
+	var COLORS = [
+		'#4dc9f6',
+		'#f67019',
+		'#f53794',
+		'#537bc4',
+		'#acc236',
+		'#166a8f',
+		'#00a950',
+		'#58595b',
+		'#8549ba'
+	];
+
+	var Samples = global.Samples || (global.Samples = {});
+	var Color = global.Color;
+
+	Samples.utils = {
+		// Adapted from http://indiegamr.com/generate-repeatable-random-numbers-in-js/
+		srand: function(seed) {
+			this._seed = seed;
+		},
+
+		rand: function(min, max) {
+			var seed = this._seed;
+			min = min === undefined ? 0 : min;
+			max = max === undefined ? 1 : max;
+			this._seed = (seed * 9301 + 49297) % 233280;
+			return min + (this._seed / 233280) * (max - min);
+		},
+
+		numbers: function(config) {
+			var cfg = config || {};
+			var min = cfg.min || 0;
+			var max = cfg.max || 1;
+			var from = cfg.from || [];
+			var count = cfg.count || 8;
+			var decimals = cfg.decimals || 8;
+			var continuity = cfg.continuity || 1;
+			var dfactor = Math.pow(10, decimals) || 0;
+			var data = [];
+			var i, value;
+
+			for (i = 0; i < count; ++i) {
+				value = (from[i] || 0) + this.rand(min, max);
+				if (this.rand() <= continuity) {
+					data.push(Math.round(dfactor * value) / dfactor);
+				} else {
+					data.push(null);
+				}
+			}
+
+			return data;
+		},
+
+		labels: function(config) {
+			var cfg = config || {};
+			var min = cfg.min || 0;
+			var max = cfg.max || 100;
+			var count = cfg.count || 8;
+			var step = (max - min) / count;
+			var decimals = cfg.decimals || 8;
+			var dfactor = Math.pow(10, decimals) || 0;
+			var prefix = cfg.prefix || '';
+			var values = [];
+			var i;
+
+			for (i = min; i < max; i += step) {
+				values.push(prefix + Math.round(dfactor * i) / dfactor);
+			}
+
+			return values;
+		},
+
+		months: function(config) {
+			var cfg = config || {};
+			var count = cfg.count || 12;
+			var section = cfg.section;
+			var values = [];
+			var i, value;
+
+			for (i = 0; i < count; ++i) {
+				value = Months[Math.ceil(i) % 12];
+				values.push(value.substring(0, section));
+			}
+
+			return values;
+		},
+
+		color: function(index) {
+			return COLORS[index % COLORS.length];
+		},
+
+		transparentize: function(color, opacity) {
+			var alpha = opacity === undefined ? 0.5 : 1 - opacity;
+			return Color(color).alpha(alpha).rgbString();
+		}
+	};
+
+	// DEPRECATED
+	window.randomScalingFactor = function() {
+		return Math.round(Samples.utils.rand(-100, 100));
+	};
+
+	// INITIALIZATION
+
+	Samples.utils.srand(Date.now());
+
+	// Google Analytics
+	/* eslint-disable */
+	if (document.location.hostname.match(/^(www\.)?chartjs\.org$/)) {
+		(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+		(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+		m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+		})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+		ga('create', 'UA-28909194-3', 'auto');
+		ga('send', 'pageview');
+	}
+	/* eslint-enable */
+
+}(this));