It appears you have a well-structured Git repository with various files, including SVG icons and HTML documents. Here's a brief overview:

backend/node_modules/mini-svg-data-uri/index.js

@@ -0,0 +1,55 @@
+var shorterNames = require('./shorter-css-color-names');
+var REGEX = {
+  whitespace: /\s+/g,
+  urlHexPairs: /%[\dA-F]{2}/g,
+  quotes: /"/g,
+}
+
+function collapseWhitespace(str) {
+  return str.trim().replace(REGEX.whitespace, ' ');
+}
+
+function dataURIPayload(string) {
+  return encodeURIComponent(string)
+    .replace(REGEX.urlHexPairs, specialHexEncode);
+}
+
+// `#` gets converted to `%23`, so quite a few CSS named colors are shorter than
+// their equivalent URL-encoded hex codes.
+function colorCodeToShorterNames(string) {
+  Object.keys(shorterNames).forEach(function(key) {
+    if (shorterNames[key].test(string)) {
+      string = string.replace(shorterNames[key], key);
+    }
+  });
+
+  return string;
+}
+
+function specialHexEncode(match) {
+  switch (match) { // Browsers tolerate these characters, and they're frequent
+    case '%20': return ' ';
+    case '%3D': return '=';
+    case '%3A': return ':';
+    case '%2F': return '/';
+    default: return match.toLowerCase(); // compresses better
+  }
+}
+
+function svgToTinyDataUri(svgString) {
+  if (typeof svgString !== 'string') {
+    throw new TypeError('Expected a string, but received ' + typeof svgString);
+  }
+  // Strip the Byte-Order Mark if the SVG has one
+  if (svgString.charCodeAt(0) === 0xfeff) { svgString = svgString.slice(1) }
+
+  var body = colorCodeToShorterNames(collapseWhitespace(svgString))
+    .replace(REGEX.quotes, "'");
+  return 'data:image/svg+xml,' + dataURIPayload(body);
+}
+
+svgToTinyDataUri.toSrcset = function toSrcset(svgString) {
+  return svgToTinyDataUri(svgString).replace(/ /g, '%20');
+}
+
+module.exports = svgToTinyDataUri;