express-ipfilter with lightweight custom middleware (#3917)
This fixes security issue [CVE-2023-42282](https://github.com/advisories/GHSA-78xj-cgh5-2h22), which is not very likely to be exploitable in MagicMirror² setups, but still should be fixed. The [express-ipfilter](https://www.npmjs.com/package/express-ipfilter) package depends on the obviously unmaintained [ip](https://github.com/indutny/node-ip) package, which has known security vulnerabilities. Since no fix is available, this commit replaces both dependencies with a custom middleware using the better maintained [ipaddr.js](https://www.npmjs.com/package/ipaddr.js) library. Changes: - Add new `js/ip_access_control.js` with lightweight middleware - Remove `express-ipfilter` dependency, add `ipaddr.js` - Update `js/server.js` to use new middleware - In addition, I have formulated the descriptions of the corresponding tests a little more clearly.
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