Follow the instructions in this guide to replace the Kubernetes Ingress Controller Fake Certificate default cert which ingress-nginx serves over 443/tcp (HTTPS) by default.
After following this doc, all deployments receiving Akash Provider hostnames within *.ingress.<yourdomain> or *.<yourdomain> will automatically have the wildcard Let's Encrypt certificate. This will ensure that users interacting with such deployments will not receive self signed certificate warnings.