How can I host Discourse for free?

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It’s done:

Can I host a Discourse forum for free?

In short… Short answer: no. Less short answer: technically, yes, but you may face technical difficulties, and your server will probably have very low specs, resulting in a slow, sometimes hanging forum. It’s also likely you’ll need a credit card, even without fees. Basically, if you need a fully functional Discourse forum and a good user experience, you can’t have this for free. Why can’t I easily set up a Discourse forum for free? Discourse has some requirements. You need a Linux server …

Feel free to complete guys, there are parts that could benefit from additional information