fix(image-upload): make imageRouter ESM ready

Signed-off-by: Erik Michelson <github@erik.michelson.eu>

lib/web/imageRouter/index.js

@@ -1,5 +1,10 @@
 'use strict'
 
+import isSvg from 'is-svg'
+
+import { createRequire } from 'module'
+const require = createRequire(import.meta.url)
+
 const Router = require('express').Router
 const formidable = require('formidable')
 const path = require('path')
@@ -7,7 +12,6 @@ const fs = require('fs')
 const { v4: uuidv4 } = require('uuid')
 const os = require('os')
 const rimraf = require('rimraf')
-const isSvg = require('is-svg')
 const { JSDOM } = require('jsdom')
 
 const config = require('../../config')
@@ -24,7 +28,8 @@ try {
   logger.error('Failed to initialize DOMPurify for SVG sanitization:', err)
 }
 
-const imageRouter = (module.exports = Router())
+const imageRouter = Router()
+export default imageRouter
 
 async function checkUploadType (filePath) {
   const extension = path.extname(filePath).toLowerCase()
@@ -32,7 +37,7 @@ async function checkUploadType (filePath) {
   let typeFromMagic = await FileType.fileTypeFromFile(filePath)
   if (extension === '.svg' && (typeFromMagic === undefined || typeFromMagic.mime === 'application/xml')) {
     const fileContent = fs.readFileSync(filePath)
-    if (isSvg(fileContent)) {
+    if (isSvg(fileContent.toString())) {
       typeFromMagic = {
         ext: 'svg',
         mime: 'image/svg+xml'