Bump proxy-addr from 2.0.7 to 2.0.8 in /frontend

Bumps [proxy-addr](https://github.com/jshttp/proxy-addr) from 2.0.7 to 2.0.8.
- [Release notes](https://github.com/jshttp/proxy-addr/releases)
- [Changelog](https://github.com/jshttp/proxy-addr/blob/master/HISTORY.md)
- [Commits](https://github.com/jshttp/proxy-addr/compare/v2.0.7...v2.0.8)

---
updated-dependencies:
- dependency-name: proxy-addr
  dependency-version: 2.0.8
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package-lock.json

@@ -8688,16 +8688,21 @@
       }
     },
     "node_modules/proxy-addr": {
-      "version": "2.0.7",
-      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
-      "integrity": "sha512-llQsMLSUDUPT44jdrU/O37qlnifitDP+ZwrmmZcoSKyLKvtZxpyV0n2/bD/N4tBAAZ/gJEdZU7KMraoK1+XYAg==",
+      "version": "2.0.8",
+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.8.tgz",
+      "integrity": "sha512-5nnx0yGyVUcY6t9RnWcARWtwT9F1D8O9rt08htPvnd49W1IgZtmLkhu9WfMzQj1cFxjHIO6connUNVW5k7AVyQ==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "forwarded": "0.2.0",
         "ipaddr.js": "1.9.1"
       },
       "engines": {
         "node": ">= 0.10"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
       }
     },
     "node_modules/proxy-addr/node_modules/ipaddr.js": {
@@ -17026,9 +17031,9 @@
       }
     },
     "proxy-addr": {
-      "version": "2.0.7",
-      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
-      "integrity": "sha512-llQsMLSUDUPT44jdrU/O37qlnifitDP+ZwrmmZcoSKyLKvtZxpyV0n2/bD/N4tBAAZ/gJEdZU7KMraoK1+XYAg==",
+      "version": "2.0.8",
+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.8.tgz",
+      "integrity": "sha512-5nnx0yGyVUcY6t9RnWcARWtwT9F1D8O9rt08htPvnd49W1IgZtmLkhu9WfMzQj1cFxjHIO6connUNVW5k7AVyQ==",
       "dev": true,
       "requires": {
         "forwarded": "0.2.0",