Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/chalk/source/util.js

@@ -1,39 +0,0 @@
-'use strict';
-
-const stringReplaceAll = (string, substring, replacer) => {
-	let index = string.indexOf(substring);
-	if (index === -1) {
-		return string;
-	}
-
-	const substringLength = substring.length;
-	let endIndex = 0;
-	let returnValue = '';
-	do {
-		returnValue += string.substr(endIndex, index - endIndex) + substring + replacer;
-		endIndex = index + substringLength;
-		index = string.indexOf(substring, endIndex);
-	} while (index !== -1);
-
-	returnValue += string.substr(endIndex);
-	return returnValue;
-};
-
-const stringEncaseCRLFWithFirstIndex = (string, prefix, postfix, index) => {
-	let endIndex = 0;
-	let returnValue = '';
-	do {
-		const gotCR = string[index - 1] === '\r';
-		returnValue += string.substr(endIndex, (gotCR ? index - 1 : index) - endIndex) + prefix + (gotCR ? '\r\n' : '\n') + postfix;
-		endIndex = index + 1;
-		index = string.indexOf('\n', endIndex);
-	} while (index !== -1);
-
-	returnValue += string.substr(endIndex);
-	return returnValue;
-};
-
-module.exports = {
-	stringReplaceAll,
-	stringEncaseCRLFWithFirstIndex
-};