Fix security vulnerabilities detected by Trivy

- CVE-2025-64756: glob CLI command injection - added override to use glob ^11.1.0
- CVE-2025-13466: body-parser DoS - added override to use body-parser ^2.2.1
- CVE-2025-64718: js-yaml prototype pollution - updated to js-yaml ^4.1.1
- BusyBox vulnerabilities (netstat, tar) - added apk upgrade to all Dockerfiles

Changes:
- backend/package.json: Updated js-yaml, added overrides for glob, body-parser
- frontend/package.json: Added overrides for glob, js-yaml
- All Dockerfiles: Added 'apk upgrade --no-cache' to get latest security patches
- backend/Dockerfile.dev: Updated from node:18-alpine to node:20-alpine

backend/package.json

@@ -33,7 +33,7 @@
     "i18next-browser-languagedetector": "^8.2.0",
     "i18next-http-backend": "^3.0.2",
     "joi": "^17.9.1",
-    "js-yaml": "^4.1.0",
+    "js-yaml": "^4.1.1",
     "jsonwebtoken": "^9.0.0",
     "knex": "^2.4.2",
     "mime-types": "^3.0.1",
@@ -59,6 +59,9 @@
   "overrides": {
     "prebuild-install": {
       "tar-fs": "2.1.4"
-    }
+    },
+    "glob": "^11.1.0",
+    "body-parser": "^2.2.1",
+    "js-yaml": "^4.1.1"
   }
 }