Most work is probably getting a domain with respective TLS certs. Otherwise there are many options. If you just need it for three days you might want to check A

Most work is probably getting a domain with respective TLS certs. Otherwise there are many options. If you just need it for three days you might want to check AWS ECS. A bit more expensive perhaps, but quite easy configuration and they provide domain and certs within a few minutes from my experience and the price shouldn't matter too much for a few days.