feat: add a function to init properly app library

crates/backend/src/lib.rs

@@ -2,6 +2,20 @@ use anyhow::Error as AnyError;
 use axum::http::{StatusCode, Uri};
 use axum::response::{IntoResponse, Response};
 use axum::{routing::get, Router};
+use thiserror::Error;
+
+use ::utils::config::{load_config, ConfigError};
+
+#[derive(Error, Debug)]
+pub enum InitError {
+    #[error(transparent)]
+    ConfigError(#[from] ConfigError),
+}
+
+pub fn init() -> Result<(), InitError> {
+    load_config(None)?;
+    Ok(())
+}
 
 pub fn get_router() -> Router {
     Router::new()