Vault Docker image and self signed cert

Is there a way to start the vault docker image so it creates its own self signed certs on startup?

I’m starting an aws fargate service for vault. I won’t go into gory details but for what I’m doing it’s a lot of extra work to either extend the vault docker image or to create the data within aws and mount it into the instances (because I’m creating an automated solution, manually doing this is not a huge deal).