Deploy my small MeteorJS app to Digital Ocean

I need someone you can help me to deploy my small MeteorJS application to Digital Ocean server. I successfully created a Digital Ocean droplet, configured it according to this tutorial - [login to view URL] , but getting an error at the last step (verifying deployment). I successfully do the command "mupx setup" (although it only works with my droplet's IP address, doesn't work with my domain name, I don't know why). So here is basically what you need to do: 1) Deploy my MeteorJS app to my Digital Ocean droplet, install the free "LetsEncrypt" SSL certificate and make it work on my domain (its DNS is assigned to the droplet already). You should either 1) write me a short tutorial on how can I do this or 2) do it by yourself (I can give you my login) and tell me your exact steps what you did. I'm using 1.4.2 (or 1.4.1.2) version of MeteorJS Thank you in advance Lukas