Add openid-connecter discovery route

src/data/app_config.rs

@@ -45,4 +45,12 @@ impl AppConfig {
     pub fn clients_file(&self) -> PathBuf {
         self.storage_path().join(CLIENTS_LIST_FILE)
     }
+
+    pub fn full_url(&self, uri: &str) -> String {
+        if uri.starts_with("/") {
+            format!("{}{}", self.website_origin, uri)
+        } else {
+            format!("{}/{}", self.website_origin, uri)
+        }
+    }
 }