chore: update readme to change npm -> bun

README.md

@@ -35,11 +35,13 @@ will likely be incompatible, and the web console will get very upset.
 
 ## try it out!
 
-- `git clone` this repo
-- `npm install` the dependencies
-- `npm run dev` to spin up the dev environment
+campfire uses [bun](https://bun.sh/) as a package manager and runtime.
 
-if you wish to run this in production, you need only `npm run build` and
+- `git clone` this repo
+- `bun install` the dependencies
+- `bun run dev` to spin up the dev environment
+
+if you wish to run this in production, you need only `bun run build` and
 place the static files somewhere accessible by a static webhost, such as
 nginx or apache! **note:** your web server should attempt to reach
 `/fallback.html` before erroring out.