add example config to readme

README.md

@@ -2,6 +2,23 @@
 
 Simple nostr notification service.
 
+## Example Config
+
+The location of the config is expected to be in the location for your machine as defined in the
+[`dirs` crate](https://docs.rs/dirs/latest/dirs/). On Linux, that will be `$HOME/.config/bullrun/config.toml`.
+The config is a TOML file. An example is below.
+
+```toml
+# The npub to monitor and notify of events on
+npub = "npub1kmgpttf3hzmpnfa9jrpu99tqr8x865r2m7mkwwcvfs7pazm6dnvq5c97vh"
+
+# Special npubs that have live events you want to be notified about
+event_npubs = [
+  # RHR
+  "npub10uthwp4ddc9w5adfuv69m8la4enkwma07fymuetmt93htcww6wgs55xdlq",
+]
+```
+
 ## Development
 
 Ensure Rust and Cargo are installed. The easiey way to do that is using [rustup](https://rustup.rs/). Then run the development server.