mu4e+mbsync+msmtp
The ancestral high-protein diet: drinking the tears of your fallen enemies.
That could be very useful when using a text-based web browser (e.g. TUI)
I am not an expert, but I see that the Apache license has no copyleft.
Have you heard of Beeper?
I think Matrix has bridges to all these networks, except ActivityPub (it may, I just don’t know).
I don’t know about OP, but it is available in https://thecapslock.gitlab.io/fdroid-patched-apps/fdroid/repo and https://calyxos.gitlab.io/calyx-fdroid-repo/fdroid/repo
I have seen many different ways to achieve that in Emacs. Do you have one to recommend (modes, packages)? Do you synchronise calendars with other devices (e.g. smartphone, server)?
https://github.com/spantaleev/matrix-docker-ansible-deploy makes it easy to deploy.
Not sure about the RAM limitation. If Synapse is too heavy, perhaps a different server (Dendrite?) will be light enough.
There is a payment option inside the app. It uses Stripe to process the payment.
Nice explanation =). I am not OP but I am curious about one point: you seem to have the reverse proxy on your homeserver, not on the VPS.
Is wireguard enough then to tunnel HTTPS traffic to your reverse proxy? Or do you need a more sophiscated tunnel (e.g. ngrok, boringproxy).
P.S. I actually assumed that your VPN entry point is a VPS with a public, static IP. Therefore I understood that your were talking about two servers: the home server with the reverse proxy and a VPS as wireguard entry point. Please correct if this is wrong.