Update README, add launch instructions

README.md

@@ -1,23 +1,52 @@
-This project aims to re-create the functionality of "Minecraft Classic" for the sake of creating a game that could be considered finished while developing code and experience that can be used in future projects that have greater ambitions.
-
-We're using [Bevy] (and thus Rust) and are going to be making heavy use of Entity Component System (ECS) design.
+This project, written in Rust and using [Bevy], aims to re-create the functionality of Minecraft "Classic" (2009) for the sake of creating a game that could be considered finished while developing code and experience that can be used in future projects that have greater ambitions.
 
 [Bevy]: https://bevy.org/
 
 ## Goals
 
-- Creative mode editing
-- Basic player physics
-- Simple cellular automaton interactions
-- Limited world size (configurable)
-- Data-driven block palette loaded at startup
-- Custom block models (and textures)
-- Multiplayer
-- Run in browser
+- ☐ Creative mode editing
+- ☐ Basic player physics
+- ☐ Limited world size (configurable)
+- ☐ Block definitions loaded at startup
+- ☐ Custom block models (and textures)
+- ☐ Simple cellular automaton interactions
+- ☑ Multiplayer (server-authoritative)
+- ☑ Runs in browser
 
 ## Non-goals
 
-- Non-player entities.
-- "Infinite" terrain. It shouldn't be too difficult to support this, but this is to keep the scope of the project small. This can be explored when the game is in a playable state.
-- More sensible liquid handling such as "waterlogging", partial liquid blocks and flow mechanics.
-- Modding API. Something I'd like to see, but also out of scope.
+- Non-player entities (animals, falling blocks, block entities)
+- Modding API (other than loading block definitions)
+- Infinite, streaming terrain (possible, but currently out of scope)
+- Sensible liquid handling (waterlogging, partial liquid blocks, flow mechanics)
+
+## How to Launch
+
+Since the game is still way too early in development, there are no releases yet.
+
+To compile and run it yourself, other than setting up Rust (through `rustup` for example), I recommend using [Bevy CLI]. It simplifies some tasks, such as building and testing on web. But if you don't want to use it, just replace `bevy run` with `cargo run` in the following code block.
+
+```sh
+# Run the game locally.
+bevy run
+bevy run -- local           # same as above
+bevy run --release -- local # with release optimizations
+
+# Host a server for the game and play on it.
+# When starting up, will print the "certificate digest".
+bevy run -- host [PORT]
+
+# Connect to an existing server.
+bevy run -- connect <ADDRESS[:PORT]> <DIGEST>
+```
+
+To test the game in the browser, you can do the following:
+
+```sh
+# Run a local webserver to serve the game, and open it.
+bevy run web --open
+```
+
+If you want to connect to a server, add `?connect=<ADDRESS[:PORT]>&digest=<DIGEST>` to URL. Due to a limitation, hostnames like `localhost` won't work here – use an IP instead. Also note that I had no luck getting WebTransport working in Firefox, so you may want to try with a Chromium-based browser.
+
+[Bevy CLI]: https://github.com/TheBevyFlock/bevy_cli