feat: customizable data storage path

common/src/utils/config.rs

@@ -9,6 +9,12 @@ pub struct AppConfig {
     pub surrealdb_password: String,
     pub surrealdb_namespace: String,
     pub surrealdb_database: String,
+    // #[serde(default = "default_data_dir")]
+    pub data_dir: String,
+}
+
+fn default_data_dir() -> String {
+    "./data".to_string()
 }
 
 pub fn get_config() -> Result<AppConfig, ConfigError> {