add proxy configuration value

+ document possible configuration options

fixes #109

src/config.rs

@@ -8,11 +8,12 @@ use directories::ProjectDirs;
 
 pub const CLIENT_ID: &str = "d420a117a32841c2b3474932e49fb54b";
 
-#[derive(Serialize, Deserialize, Debug, Default)]
+#[derive(Clone, Serialize, Deserialize, Debug, Default)]
 pub struct Config {
     pub keybindings: Option<HashMap<String, Command>>,
     pub theme: Option<ConfigTheme>,
     pub use_nerdfont: Option<bool>,
+    pub proxy: Option<String>,
 }
 
 #[derive(Serialize, Deserialize, Debug, Default, Clone)]