Link of the day, well, does what it says on the tin. It redirects a user to a different link every day. I built this for QuantumBlack, with the plan to generate a QR code that encodes qb.zainp.com (where my version of this is hosted) and build the QR code with post-it notes. People can walk by and scan the QR code and get a different link everyday, where links are crowdsources from employees. We'll see if it catches on...
I'm a software engineer and a mathematician, that should answer your question...
git clone the repository, make sure you have Docker 🐳 installed, then docker-compose up should do it.
It's a simple Go HTTP server, connected to a Postgres database and backed by the links package that retrieves the URL scheduled for the current date, updates the visit count and saves new URLs. I deploy it on Heroku and manage the domain via Netlify.
A GET request will be met with a 301 temporary redirect, to the days scheduled link and a POST or PUT request, appropriate formatted with Content-Type application/x-www-form-urlencoded with data url=<YOUR-URL> will save the URL and automatically schedule it for the next available slot, so it's very much first come, first serve.