How to install SSL on Digital Ocean one click install

I used the digital ocean one click install and managed to get a custom domain by pointing my A record to the IP address of the droplet, but I cannot find any instructions anywhere on how to install an SSL certificate and I dont want to met up my installation by running my own commands, someone please assist.

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this is something that should be done with original installation ... after all it is accounting information and should be secured by default. Any tutorials or guidance on this ?