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/postcss-svgo/LICENSE-MIT

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+Copyright (c) Ben Briggs <beneb.info@gmail.com> (http://beneb.info)
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

backend/node_modules/postcss-svgo/README.md

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+# [postcss][postcss]-svgo
+
+> Optimise inline SVG with PostCSS.
+
+
+## Install
+
+With [npm](https://npmjs.org/package/postcss-svgo) do:
+
+```
+npm install postcss-svgo --save
+```
+
+
+## Example
+
+### Input
+
+```css
+h1 {
+    background: url('data:image/svg+xml;charset=utf-8,<?xml version="1.0" encoding="utf-8"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve"><circle cx="50" cy="50" r="40" fill="yellow" /></svg>');
+}
+
+h2 {
+    background: url('data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz48IURPQ1RZUEUgc3ZnIFBVQkxJQyAiLS8vVzNDLy9EVEQgU1ZHIDEuMS8vRU4iICJodHRwOi8vd3d3LnczLm9yZy9HcmFwaGljcy9TVkcvMS4xL0RURC9zdmcxMS5kdGQiPjxzdmcgdmVyc2lvbj0iMS4xIiBpZD0iTGF5ZXJfMSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayIgeG1sOnNwYWNlPSJwcmVzZXJ2ZSI+PGNpcmNsZSBjeD0iNTAiIGN5PSI1MCIgcj0iNDAiIGZpbGw9InllbGxvdyIgLz48IS0tdGVzdCBjb21tZW50LS0+PC9zdmc+');
+}
+```
+
+### Output
+
+```css
+h1 {
+    background: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="%23ff0"/></svg>');
+}
+
+h2 {
+    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxjaXJjbGUgY3g9IjUwIiBjeT0iNTAiIHI9IjQwIiBmaWxsPSIjZmYwIi8+PC9zdmc+');
+}
+```
+
+
+## API
+
+### `svgo([options])`
+
+#### options
+
+##### encode
+
+Type: `boolean`
+Default: `undefined`
+
+If `true`, it will encode URL-unsafe characters such as `<`, `>` and `&`;
+`false` will decode these characters, and `undefined` will neither encode nor
+decode the original input. Note that regardless of this setting, `#` will
+always be URL-encoded.
+
+##### plugins
+
+Optionally, you can customise the output by specifying the `plugins` option. You
+will need to provide the config in comma separated objects, like the example
+below. Note that you can either disable the plugin by setting it to `false`,
+or pass different options to change the default behaviour.
+
+```js
+const postcss = require('postcss');
+const svgo = require('postcss-svgo');
+
+const opts = {
+    plugins: [{
+        name: 'preset-default',
+        params: {
+            overrides: {
+                removeViewBox: false,
+                removeComments: false,
+                cleanupNumericValues: {
+                    floatPrecision: 2
+                }
+            }
+        }
+    }]
+};
+
+
+postcss([ svgo(opts) ]).process(css).then((result) => {
+    console.log(result.css)
+});
+```
+
+You can view the [full list of plugins here][plugins].
+
+
+## Usage
+
+See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
+examples for your environment.
+
+
+## Contributors
+
+See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
+
+
+## License
+
+MIT © [Ben Briggs](http://beneb.info)
+
+[postcss]: https://github.com/postcss/postcss
+[plugins]: https://svgo.dev/docs/plugins/

backend/node_modules/postcss-svgo/package.json

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+{
+  "name": "postcss-svgo",
+  "version": "7.0.2",
+  "description": "Optimise inline SVG with PostCSS.",
+  "main": "src/index.js",
+  "types": "types/index.d.ts",
+  "files": [
+    "LICENSE-MIT",
+    "src",
+    "types"
+  ],
+  "keywords": [
+    "css",
+    "minify",
+    "optimise",
+    "postcss",
+    "postcss-plugin",
+    "svg",
+    "svgo"
+  ],
+  "license": "MIT",
+  "homepage": "https://github.com/cssnano/cssnano",
+  "author": {
+    "name": "Ben Briggs",
+    "email": "beneb.info@gmail.com",
+    "url": "http://beneb.info"
+  },
+  "repository": "cssnano/cssnano",
+  "dependencies": {
+    "postcss-value-parser": "^4.2.0",
+    "svgo": "^3.3.2"
+  },
+  "bugs": {
+    "url": "https://github.com/cssnano/cssnano/issues"
+  },
+  "engines": {
+    "node": "^18.12.0 || ^20.9.0 || >= 18"
+  },
+  "devDependencies": {
+    "pleeease-filters": "^4.0.0",
+    "postcss": "^8.5.3"
+  },
+  "peerDependencies": {
+    "postcss": "^8.4.32"
+  }
+}

backend/node_modules/postcss-svgo/src/globals.d.ts

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+declare var URL: typeof import('url').URL;

backend/node_modules/postcss-svgo/src/index.js

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+'use strict';
+const valueParser = require('postcss-value-parser');
+const { optimize } = require('svgo');
+const { encode, decode } = require('./lib/url');
+
+const PLUGIN = 'postcss-svgo';
+const dataURI = /data:image\/svg\+xml(;((charset=)?utf-8|base64))?,/i;
+const dataURIBase64 = /data:image\/svg\+xml;base64,/i;
+
+// the following regex will globally match:
+// \b([\w-]+)       --> a word (a sequence of one or more [alphanumeric|underscore|dash] characters; followed by
+// \s*=\s*          --> an equal sign character (=) between optional whitespaces; followed by
+// \\"([\S\s]+?)\\" --> any characters (including whitespaces and newlines) between literal escaped quotes (\")
+const escapedQuotes = /\b([\w-]+)\s*=\s*\\"([\S\s]+?)\\"/g;
+
+/**
+ * @param {string} input the SVG string
+ * @param {Options} opts
+ * @return {{result: string, isUriEncoded: boolean}} the minification result
+ */
+function minifySVG(input, opts) {
+  let svg = input;
+  let decodedUri, isUriEncoded;
+  try {
+    decodedUri = decode(input);
+    isUriEncoded = decodedUri !== input;
+  } catch {
+    // Swallow exception if we cannot decode the value
+    isUriEncoded = false;
+  }
+
+  if (isUriEncoded) {
+    svg = /** @type {string} */ (decodedUri);
+  }
+
+  if (opts.encode !== undefined) {
+    isUriEncoded = opts.encode;
+  }
+
+  // normalize all escaped quote characters from svg attributes
+  // from <svg attr=\"value\"... /> to <svg attr="value"... />
+  // see: https://github.com/cssnano/cssnano/issues/1194
+  svg = svg.replace(escapedQuotes, '$1="$2"');
+
+  const result = optimize(svg, opts);
+
+  return {
+    result: /** @type {import('svgo').Output}*/ (result).data,
+    isUriEncoded,
+  };
+}
+
+/**
+ * @param {import('postcss').Declaration} decl
+ * @param {Options} opts
+ * @param {import('postcss').Result} postcssResult
+ * @return {void}
+ */
+function minify(decl, opts, postcssResult) {
+  const parsed = valueParser(decl.value);
+
+  const minified = parsed.walk((node) => {
+    if (
+      node.type !== 'function' ||
+      node.value.toLowerCase() !== 'url' ||
+      !node.nodes.length
+    ) {
+      return;
+    }
+    let { value, quote } = /** @type {valueParser.StringNode} */ (
+      node.nodes[0]
+    );
+
+    let optimizedValue;
+
+    try {
+      if (dataURIBase64.test(value)) {
+        const url = new URL(value);
+        const base64String = `${url.protocol}${url.pathname}`.replace(
+          dataURI,
+          ''
+        );
+        const svg = Buffer.from(base64String, 'base64').toString('utf8');
+        const { result } = minifySVG(svg, opts);
+        const data = Buffer.from(result).toString('base64');
+        optimizedValue = 'data:image/svg+xml;base64,' + data + url.hash;
+      } else if (dataURI.test(value)) {
+        const svg = value.replace(dataURI, '');
+        const { result, isUriEncoded } = minifySVG(svg, opts);
+        let data = isUriEncoded ? encode(result) : result;
+        // Should always encode # otherwise we yield a broken SVG
+        // in Firefox (works in Chrome however). See this issue:
+        // https://github.com/cssnano/cssnano/issues/245
+        data = data.replace(/#/g, '%23');
+        optimizedValue = 'data:image/svg+xml;charset=utf-8,' + data;
+        quote = isUriEncoded ? '"' : "'";
+      } else {
+        return;
+      }
+    } catch (error) {
+      decl.warn(postcssResult, `${error}`);
+      return;
+    }
+    node.nodes[0] = Object.assign({}, node.nodes[0], {
+      value: optimizedValue,
+      quote: quote,
+      type: 'string',
+      before: '',
+      after: '',
+    });
+
+    return false;
+  });
+
+  decl.value = minified.toString();
+}
+/** @typedef {{encode?: boolean} & import('svgo').Config} Options */
+/**
+ * @type {import('postcss').PluginCreator<Options>}
+ * @param {Options} opts
+ * @return {import('postcss').Plugin}
+ */
+function pluginCreator(opts = {}) {
+  return {
+    postcssPlugin: PLUGIN,
+
+    OnceExit(css, { result }) {
+      css.walkDecls((decl) => {
+        if (!dataURI.test(decl.value)) {
+          return;
+        }
+
+        minify(decl, opts, result);
+      });
+    },
+  };
+}
+
+pluginCreator.postcss = true;
+module.exports = pluginCreator;

backend/node_modules/postcss-svgo/src/lib/url.js

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+'use strict';
+/**
+ * @param {string} data
+ * @return {string}
+ */
+function encode(data) {
+  return data
+    .replace(/"/g, "'")
+    .replace(/%/g, '%25')
+    .replace(/</g, '%3C')
+    .replace(/>/g, '%3E')
+    .replace(/&/g, '%26')
+    .replace(/#/g, '%23')
+    .replace(/\s+/g, ' ');
+}
+
+const decode = decodeURIComponent;
+module.exports = { encode, decode };

backend/node_modules/postcss-svgo/types/index.d.ts

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+export = pluginCreator;
+/** @typedef {{encode?: boolean} & import('svgo').Config} Options */
+/**
+ * @type {import('postcss').PluginCreator<Options>}
+ * @param {Options} opts
+ * @return {import('postcss').Plugin}
+ */
+declare function pluginCreator(opts?: Options): import("postcss").Plugin;
+declare namespace pluginCreator {
+    export { postcss, Options };
+}
+declare var postcss: true;
+type Options = {
+    encode?: boolean;
+} & import("svgo").Config;
+//# sourceMappingURL=index.d.ts.map

backend/node_modules/postcss-svgo/types/index.d.ts.map

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+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.js"],"names":[],"mappings":";AAoHA,oEAAoE;AACpE;;;;GAIG;AACH,sCAHW,OAAO,GACN,OAAO,SAAS,EAAE,MAAM,CAgBnC;;;;;eApBa;IAAC,MAAM,CAAC,EAAE,OAAO,CAAA;CAAC,GAAG,OAAO,MAAM,EAAE,MAAM"}

backend/node_modules/postcss-svgo/types/lib/url.d.ts

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+/**
+ * @param {string} data
+ * @return {string}
+ */
+export function encode(data: string): string;
+export const decode: typeof decodeURIComponent;
+//# sourceMappingURL=url.d.ts.map

backend/node_modules/postcss-svgo/types/lib/url.d.ts.map

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+{"version":3,"file":"url.d.ts","sourceRoot":"","sources":["../../src/lib/url.js"],"names":[],"mappings":"AACA;;;GAGG;AACH,6BAHW,MAAM,GACL,MAAM,CAWjB;AAED,+CAAkC"}