Sorry if this may be a too broad question but I need guidance...

I want to host my Asp.net core 2.0 application as cheap as possible with a free SSL from let's encrypt.

I've tried some windows hosting but they don't provide let's encrypt certificates and sell you their own. Azure hosting is at least 50 dollars a month if you want SSL...

I need docker right? And host it on a Linux machine?

I have not yet started the project so all options are available.

Thank you in advance