How to install keycloak onto digital ocean

Hey, I am a newbie to Keycloak and identity servers,
So my requirement is:
I want to use a 1GB ram digital ocean droplet (I have tried docker but I am also a newbie to docker).
So there is a SAML application and one app to which I want to connect the Keycloak server to, and change the domain name of that server droplet.

If it is possible to get a guide for the digital ocean. I have a question which is do I require clustering, right now I don’t have traffic so can I run Keycloak in standalone mode?