[Snyk] Security upgrade express from 4.18.1 to 4.21.2#101

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youngbryanyu wants to merge 1 commit intomainfrom snyk-fix-b107dd0e7a4be0ce9776ddb6c87a0e78

+7,909-1,313

Commits on Dec 13, 2024

fix: backend/package.json & backend/package-lock.json to reduce vulnerabilities
snyk-bot
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