Small documentation improvements

src/main.rs

@@ -200,6 +200,8 @@ async fn forecast_geo(
 }
 
 /// Starts the main maps refresh loop and sets up and launches Rocket.
+///
+/// See [`maps::run`] for the maps refresh loop.
 #[rocket::main]
 async fn main() -> Result<()> {
     color_eyre::install()?;

src/maps.rs

@@ -141,6 +141,9 @@ impl MapsRefresh for MapsHandle {
 }
 
 /// Retrieves an image from the provided URL.
+///
+/// This returns [`None`] if it fails in either performing the request, retrieving the bytes from
+/// the image or loading and the decoding the data into [`DynamicImage`].
 async fn retrieve_image(url: &str) -> Option<DynamicImage> {
     // TODO: Handle or log errors!
     let response = reqwest::get(url).await.ok()?;