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-cli/lib/DependencyGraph.js

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+import path from 'path'
+import { DepGraph } from 'dependency-graph'
+
+export default function createDependencyGraph() {
+  const graph = new DepGraph()
+  return {
+    add(message) {
+      message.parent = path.resolve(message.parent)
+      graph.addNode(message.parent)
+
+      if (message.type === 'dir-dependency') {
+        message.dir = path.resolve(message.dir)
+        graph.addNode(message.dir)
+        graph.addDependency(message.parent, message.dir)
+      } else {
+        message.file = path.resolve(message.file)
+        graph.addNode(message.file)
+        graph.addDependency(message.parent, message.file)
+      }
+
+      return message
+    },
+    dependantsOf(node) {
+      node = path.resolve(node)
+
+      if (graph.hasNode(node)) return graph.dependantsOf(node)
+      return []
+    },
+  }
+}

backend/node_modules/postcss-cli/lib/args.js

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+import yargs from 'yargs'
+
+const { argv } = yargs(process.argv.slice(2))
+  .usage(
+    `Usage:
+  $0 [input.css] [OPTIONS] [-o|--output output.css] [--watch|-w]
+  $0 <input.css>... [OPTIONS] --dir <output-directory> [--watch|-w]
+  $0 <input-directory> [OPTIONS] --dir <output-directory> [--watch|-w]
+  $0 <input-glob-pattern> [OPTIONS] --dir <output-directory> [--watch|-w]
+  $0 <input.css>... [OPTIONS] --replace`,
+  )
+  .group(
+    ['o', 'd', 'r', 'map', 'no-map', 'watch', 'verbose', 'env'],
+    'Basic options:',
+  )
+  .option('o', {
+    alias: 'output',
+    desc: 'Output file',
+    type: 'string',
+    conflicts: ['dir', 'replace'],
+  })
+  .option('d', {
+    alias: 'dir',
+    desc: 'Output directory',
+    type: 'string',
+    conflicts: ['output', 'replace'],
+  })
+  .option('r', {
+    alias: 'replace',
+    desc: 'Replace (overwrite) the input file',
+    type: 'boolean',
+    conflicts: ['output', 'dir'],
+  })
+  .alias('m', 'map')
+  .describe('map', 'Create an external sourcemap')
+  .describe('no-map', 'Disable the default inline sourcemaps')
+  .option('w', {
+    alias: 'watch',
+    desc: 'Watch files for changes and recompile as needed',
+    type: 'boolean',
+    conflicts: 'replace',
+  })
+  .option('verbose', {
+    desc: 'Be verbose',
+    type: 'boolean',
+  })
+  .option('env', {
+    desc: 'A shortcut for setting NODE_ENV',
+    type: 'string',
+  })
+  .group(
+    ['u', 'parser', 'stringifier', 'syntax'],
+    'Options for use without a config file:',
+  )
+  .option('u', {
+    alias: 'use',
+    desc: 'List of postcss plugins to use',
+    type: 'array',
+  })
+  .option('parser', {
+    desc: 'Custom postcss parser',
+    type: 'string',
+  })
+  .option('stringifier', {
+    desc: 'Custom postcss stringifier',
+    type: 'string',
+  })
+  .option('syntax', {
+    desc: 'Custom postcss syntax',
+    type: 'string',
+  })
+  .group(['ext', 'base'], 'Options for use with --dir:')
+  .option('ext', {
+    desc: 'Override the output file extension; for use with --dir',
+    type: 'string',
+    implies: 'dir',
+  })
+  .option('base', {
+    desc: 'Mirror the directory structure relative to this path in the output directory, for use with --dir',
+    type: 'string',
+    implies: 'dir',
+  })
+  .group(['include-dotfiles', 'poll', 'config'], 'Advanced options:')
+  .option('include-dotfiles', {
+    desc: 'Enable glob to match files/dirs that begin with "."',
+    type: 'boolean',
+  })
+  .option('poll', {
+    desc: 'Use polling for file watching. Can optionally pass polling interval; default 100 ms',
+    implies: 'watch',
+  })
+  .option('config', {
+    desc: 'Set a custom directory to look for a config file',
+    type: 'string',
+  })
+  .alias('h', 'help')
+  .example('$0 input.css -o output.css', 'Basic usage')
+  .example('$0 src/**/*.css --base src --dir build', 'Glob Pattern & output')
+  .example(
+    'cat input.css | $0 -u autoprefixer > output.css',
+    'Piping input & output',
+  )
+  .epilog(
+    `If no input files are passed, it reads from stdin. If neither -o, --dir, or --replace is passed, it writes to stdout.
+
+If there are multiple input files, the --dir or --replace option must be passed.
+
+Input files may contain globs (e.g. src/**/*.css). If you pass an input directory, it will process all files in the directory and any subdirectories, respecting the glob pattern.
+
+For more details, please see https://github.com/postcss/postcss-cli`,
+  )
+
+if (argv.ext && argv.ext.indexOf('.') !== 0) argv.ext = `.${argv.ext}`
+
+export default argv

backend/node_modules/postcss-cli/lib/getMapfile.js

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+import path from 'path'
+export default function getMapfile(options) {
+  if (options.map && typeof options.map.annotation === 'string') {
+    return `${path.dirname(options.to)}/${options.map.annotation}`
+  }
+  return `${options.to}.map`
+}