Instant Coupon Microsite with Social Sharing

I need a turnkey microsite that publishes discount codes and releases each code only after the visitor shares the promo on one of their social-media accounts (Facebook, X/Twitter, Instagram or LinkedIn are all fine)... (Budget: ₹1500 - ₹12500 INR, Jobs: CSS, Frontend Development, Graphic Design, HTML, JavaScript, PHP, Web Development, Website Design)