drafting readme

readme_draft.md

@@ -16,6 +16,21 @@ Reqwest ---> |            | <--- Server 5
 
 # Setup
 
+Pick a relay computer and a server computer.
+
+The relay must be able to accept incoming HTTP connections. If the relay
+will be exposed to the Internet, you should use Nginx, Caddy, or Apache as a
+reverse proxy to terminate TLS in front of ptth_relay. Relays on the Internet
+will typically have a domain name so that clients and servers can find them.
+
+The server must have read access to the files you want to serve, and it must
+be able to make outgoing HTTP(S) connections to the relay. The server
+does not need a static IP, since it won't accept any incoming HTTP connections.
+
+Begin installing PTTH. Run `cargo install ptth_relay` on the relay and
+`cargo install ptth_server` on the server. ptth_server is manually tested on 
+Windows and Linux. ptth_relay is manually tested on Linux only.
+
 - Run ptth_relay on cloud host
 - Configure ptth_server for relay, with auto keygen
 - Add tripcode to relay config