fix: upgrade express from 4.12.4 to 4.18.3

Snyk has created this PR to upgrade express from 4.12.4 to 4.18.3.

See this package in npm:
https://www.npmjs.com/package/express

See this project in Snyk:
https://app.snyk.io/org/harry.kimpel/project/9dff5636-7f9c-4ab7-b35d-0f83ae4a1e5b?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -24,7 +24,7 @@
     "ejs": "1.0.0",
     "ejs-locals": "1.0.2",
     "errorhandler": "1.2.0",
-    "express": "4.12.4",
+    "express": "4.18.3",
     "express-fileupload": "0.0.5",
     "file-type": "^8.1.0",
     "humanize-ms": "1.0.1",