Help me open source ClubsAll - need a senior security engineer to review code

Hello everyone, We built clubsall, a frontend for federated content. Since the goal is to help build a reddit competitor, open sourcing is the logical next step.

However, without a review, I am afraid website could get hacked quickly.

Does someone with experience in scanning code for security issues or white hat hacking wants to help increase confidence so I can open source it?