Perhyte

Aurora is no longer maintained, but it still works just fine. It’s a Windows app, so not web-accessible or anything, but it’s free. It only contains the SRD content by default (probably for legal reasons), but there’s at least one publicly-accessible elements repository for it that you can find using your favorite search engine.

That domain currently hosts a “this domain may be for sale” page, but it’s been registered since 2005 so it’s definitely not because of this post.

Additionally, HTTPS if very easy to set up nowadays and the certificates are free¹.

¹: Assuming you have a public domain name, but for ActivityPub that’s already a requirement due to the push nature of the protocol.

AFAIK docker-compose only puts the container names in DNS for other containers in the same stack (or in the same configured network, if applicable), not for the host system and not for other systems on the local LAN.

I have a similar setup.

Getting the DNS to return the right addresses is easy enough: you just set your records for subdomain * instead a specific subdomain, and then any subdomain that’s not explicitly configured will default to using the records for *.

Assuming you want to use Let’s Encrypt (or another ACME CA) you’ll probably want to make sure you use an ACME client that supports your DNS provider’s API (or switch DNS provider to one that has an API your client supports). That way you can get wildcard TLS certificates (so individual subdomains won’t still leak via Certificate Transparency logs). Configure your ACME client to use the Let’s Encrypt staging server until you see a wildcard certificate on your domains.

Some other stuff you’ll probably want:

• A reverse proxy to handle requests for those subdomains. I use Caddy, but basically any reverse proxy will do. The reason I like Caddy is that it has a built-in ACME client as well as a bunch of plugins for DNS providers including my preferred one. It’s a bit tricky to set this up with wildcard certificates (by default it likes to request individual subdomain certificates), but I got it working and it’s been running very smoothly since.
• To put a login screen before each service I’ve configured Caddy to only let visitors through to the real pages (or the error page, for unconfigured domains) if Authelia agrees.

I believe on the free ARM instances you get 1Gbps per core (I’ve achieved over 2Gbps on my 4-core instance, which was probably limited by the other side of the connections). What you say may be correct for the AMD instances though.

For the ARM instances they’re a gigabit per OCPU, which you can get 4 of for free (assuming you’re lucky enough with availability), so you can theoretically get 4Gbps for free.