images: add port configuration

Cargo.lock

@@ -894,6 +894,7 @@ name = "images"
 version = "0.1.0"
 dependencies = [
  "actix-web",
+ "clap",
  "lazy_static",
  "mime",
  "rand",

images/Cargo.toml

@@ -14,3 +14,4 @@ scraper = "0.17.1"
 lazy_static = "1.4.0"
 rand = "0.8.5"
 serde_json = "1.0.104"
+clap = { version = "4.3.21", features = ["derive"] }

images/src/main.rs

@@ -1,10 +1,20 @@
 use utils::error::Result;
 
 use actix_web::{get, http::header, web, App, HttpResponse, HttpServer, Responder};
+use clap::Parser;
 use rand::seq::SliceRandom;
 
 pub const BING: &str = "https://www.bing.com/images/search";
 
+/// An API for fetching images of a query, sourced from Microsoft Bing.
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// The port at which to run.
+    #[arg(short, long, default_value_t=3002)]
+    port: u16,
+}
+
 async fn get_images(query: &str) -> reqwest::Result<Vec<String>> {
     use lazy_static::lazy_static;
     use scraper::{Html, Selector};
@@ -70,7 +80,7 @@ async fn main() -> std::io::Result<()> {
             .service(route_query_random)
             .service(route_query_index)
     })
-    .bind(("127.0.0.1", 3002))?
+    .bind(("127.0.0.1", Args::parse().port))?
     .run()
     .await
 }