make the static files directory variable with env

src/main.rs

@@ -9,7 +9,7 @@ use axum::{
 };
 use serde::Deserialize;
 use sqlx::{query, SqlitePool};
-use std::net::SocketAddr;
+use std::{env, net::SocketAddr};
 use tower_http::services::ServeDir;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
 
@@ -28,10 +28,11 @@ async fn main() {
     let db_pool = SqlitePool::connect(DB_URL)
         .await
         .expect("Failed to connect to the database.");
+    let static_path = env::var("STATIC_PATH").unwrap_or("static".to_string());
 
     // build our application with some routes
     let app = Router::new()
-        .nest_service("/static", ServeDir::new("static"))
+        .nest_service("/static", ServeDir::new(static_path))
         .route("/", get(register_form))
         .route("/register/", post(register))
         .with_state(db_pool);