I just started to explore Kubernetes and I deployed a service in a container on Kubernetes which is running on a cloud.

My service requires to make a call to a database which requires a certificate for authentication. I am wondering what would be the best practice to store/install the certificate on Kubernetes

I need to access the certificate from my code which I am using as follows

const (
    serverCertificate = "./cert/api.cer"
    serverPrivateKey  = "./cert/api.key"
)
creds, err := credentials.NewServerTLSFromFile(serverCertificate, serverPrivateKey)