Just FYI, and offering a different perspective @AntiMetaman
Although Discourse can run on a VPS with minimal RAM, when you build and rebuild Discourse it will be quite slow compared to building on a machine with more RAM. I personally would not run a “truly” production Discourse app on 2GB of RAM, but that is just me.
FWIW (just my opinion only), I have installed Discourse on machines with 1GB, 2GB, 8GB, 32GB and 64 GB RAM servers, both VPM and dedicated, and honestly I like building Discourse on my 64 GB and 32GB machines. It’s so fast to build on 64GB :). Blazing fast to rebuild and runs so good, smooth like butter on hot toast. So, I prefer to run Discourse on “bigger” machines (more RAM, more disk space) with other applications than run in standalone mode on very small slices with minimal RAM.
However, that is based on my personal experience with Discourse and Docker and preferences. I like Discourse to rebuild fast and have plenty of “head room” in production and 2GB does not meet my requirements for build speed.